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1. Role of ethylene crosstalk in seed germination and early seedling development: A review

Author:
Ahammed, Golam Jalal; Gantait, Saikat; Mitra, Monisha; Yang, Youxin; Li, Xin
Source:
Plant physiology and biochemistry 2020 v.151 pp. 124-131
ISSN:
0981-9428
Subject:
cytokinins,   etc   ; auxins; crop yield; dormancy; ethylene; gibberellins; hormones; hypocotyls; models; plant growth; seed germination; seedlings;     Show all 12 Subjects
Abstract:
... Seed germination and early seedling development are two critical phases in plant lifecycle that largely determine crop yield. Phytohormones play an essential role in governing these developmental processes; of these, ethylene (ET; C₂H₄), the smallest gaseous hormone, plays a major role via crosstalk with other hormones. Typically, the mechanism of hormone (for instance, auxin, cytokinins, ET, and ...
DOI:
10.1016/j.plaphy.2020.03.016

2. Distinct metabolism of N‐glucosides of isopentenyladenine and trans‐zeatin determines cytokinin metabolic spectrum in Arabidopsis

Author:
Hošek, Petr; Hoyerová, Klára; Kiran, Nagavalli S.; Dobrev, Petre I.; Zahajská, Lenka; Filepová, Roberta; Motyka, Václav; Müller, Karel; Kamínek, Miroslav
Source:
Thenew phytologist 2020 v.225 no.6 pp. 2423-2438
ISSN:
0028-646X
Subject:
cytokinins,   etc   ; Arabidopsis thaliana; dihydrozeatin; enzymes; isomerization; isopentenyladenine; mathematical models; metabolism; metabolites; zeatin;     Show all 10 Subjects
Abstract:
... The diversity of cytokinin (CK) metabolites suggests their interconversions are the predominant regulatory mechanism of CK action. Nevertheless, little is known about their directionality and kinetics in planta. CK metabolite levels were measured in 2‐wk‐old Arabidopsis thaliana plants at several time points up to 100 min following exogenous application of selected CKs. The data were then evaluate ...
DOI:
10.1111/nph.16310

3. Remembering Donald J. Armstrong (1937–2019)

Author:
Naithani, Sushma; Arp, Daniel; Ciuffetti, Lynda; Coakley, Stella; Mills, Dallice; Simpson, Dianne; Spatafora, Joseph; Wolpert, Thomas; Zobel, Donald
Source:
Current plant biology 2019 v.20 pp. 100130
ISSN:
2214-6628
Subject:
cytokinins,   etc   ; metabolism; scientists; seed germination; students; teachers;     Show all 6 Subjects
Abstract:
... We pay tribute to Donald J. Armstrong, who passed away at age 82 on June 13, 2019 in Corvallis, Oregon, USA. He was both an excellent teacher and a respected scientist. His research spanned more than 40 years and ranged from studying cytokinin structure and activity, to secondary metabolism, to inhibition of seed germination. He is fondly remembered by his colleagues, fellow scientists and student ...
DOI:
10.1016/j.cpb.2019.100130

4. Pathways to sex determination in plants: how many roads lead to Rome?

Author:
Feng, Guanqiao; Sanderson, Brian J; Keefover-Ring, Ken; Liu, Jianquan; Ma, Tao; Yin, Tongming; Smart, Lawrence B; DiFazio, Stephen P; Olson, Matthew S
Source:
Current opinion in plant biology 2020 v.54 pp. 61-68
ISSN:
1369-5266
Subject:
cytokinins,   etc   ; Angiospermae; dioecy; ethylene; flowering; flowers; genes; parallel evolution; research programs; sex determination; signal transduction; transcriptomics; unisexuality;     Show all 13 Subjects
Abstract:
... The presence of thousands of independent origins of dioecy in angiosperms provides a unique opportunity to address the parallel evolution of the molecular pathways underlying unisexual flowers. Recent progress towards identifying sex determination genes has identified hormone response pathways, mainly associated with cytokinin and ethylene response pathways, as having been recruited multiple times ...
DOI:
10.1016/j.pbi.2020.01.004

5. How grass keeps growing: an integrated analysis of hormonal crosstalk in the maize leaf growth zone

Author:
De Vos, Dirk; Nelissen, Hilde; AbdElgawad, Hamada; Prinsen, Els; Broeckhove, Jan; Inzé, Dirk; Beemster, Gerrit T. S.
Source:
Thenew phytologist 2020 v.225 no.6 pp. 2513-2525
ISSN:
0028-646X
Subject:
cytokinins,   etc   ; Zea mays; auxins; cell division; corn; gibberellins; grasses; hormones; leaves; light intensity; mathematical models; metabolism; shade;     Show all 13 Subjects
Abstract:
... We studied the maize leaf to understand how long‐distance signals, auxin and cytokinin, control leaf growth dynamics. We constructed a mathematical model describing the transport of these hormones along the leaf growth zone and their interaction with the local gibberellin (GA) metabolism in the control of cell division. Assuming gradually declining auxin and cytokinin supply at the leaf base, the ...
DOI:
10.1111/nph.16315

6. Mass production of Pinellia ternata multiple egg-shaped micro-tubers (MESMT) through optimized growth conditions for use in ethnomedicine

Author:
Kim, Yong-Goo; Komakech, Richard; Choi, Ji Eun; Lee, Ka Youn; Lee, Tae Kyoung; Kim, Ki Hyun; Moon, Byeong Cheol; Kim, Suk Won; Kang, Youngmin
Source:
Plant cell, tissue, and organ culture 2020 v.140 no.1 pp. 173-184
ISSN:
0167-6857
Subject:
cytokinins,   etc   ; Fourier transform infrared spectroscopy; Pinellia ternata; commercialization; drugs; indole acetic acid; mass spectrometry; patents; soil; sucrose; traditional medicine; tubers;     Show all 12 Subjects
Abstract:
... The root tuber of Pinellia ternata (Thunb.) Briet has been used over the years in traditional medicine to treat myriad of diseases. In this study, a standard in vitro mass production of P. ternata multiple egg-shaped micro-tubers (MESMT) protocol was developed to meet the increasing demand for P. ternata tubers. Ten different types of media, as well as different sucrose and plant growth regulators ...
DOI:
10.1007/s11240-019-01720-5

7. Sugar availability suppresses the auxin‐induced strigolactone pathway to promote bud outgrowth

Author:
Bertheloot, Jessica; Barbier, François; Boudon, Frédéric; Perez‐Garcia, Maria Dolores; Péron, Thomas; Citerne, Sylvie; Dun, Elizabeth; Beveridge, Christine; Godin, Christophe; Sakr, Soulaiman
Source:
Thenew phytologist 2020 v.225 no.2 pp. 866-879
ISSN:
0028-646X
Subject:
cytokinins,   etc   ; apical dominance; auxins; bioinformatics; branching; buds; dose response; mutants; peas; phenotypic plasticity; shoot tips; strigolactones; sucrose;     Show all 13 Subjects
Abstract:
... Apical dominance occurs when the growing shoot tip inhibits the outgrowth of axillary buds. Apically‐derived auxin in the nodal stem indirectly inhibits bud outgrowth via cytokinins and strigolactones. Recently, sugar deprivation was found to contribute to this phenomenon. Using rose and pea, we investigated whether sugar availability interacts with auxin in bud outgrowth control, and the role of ...
DOI:
10.1111/nph.16201

8. An Update on the Signals Controlling Shoot Branching

Author:
Barbier, Francois F.; Dun, Elizabeth A.; Kerr, Stephanie C.; Chabikwa, Tinashe G.; Beveridge, Christine A.
Source:
Trends in plant science 2018
ISSN:
1360-1385
Subject:
cytokinins,   etc   ; auxins; branching; strigolactones; sugars;     Show all 5 Subjects
Abstract:
... Many new questions on the regulation of shoot branching have been raised in recent years, prompting a reassessment of the role of each signal involved, which we attempt in this review. Sugars and their signaling networks have been attributed a major role in the early events of axillary bud outgrowth, whereas cytokinin appears to play a critical role in the modulation of this process in response to ...
DOI:
10.1016/j.tplants.2018.12.001

9. Characterization of Top Leader Elongation in Nordmann Fir (Abies nordmanniana)

Author:
Martens, Helle Juel; Sørensen, Steen; Burow, Meike; Veierskov, Bjarke
Source:
Journal of plant growth regulation 2019 v.38 no.4 pp. 1354-1361
ISSN:
0721-7595
Subject:
cytokinins,   etc   ; Abies nordmanniana; Angiospermae; auxins; budbreak; cell walls; staining;     Show all 7 Subjects
Abstract:
... Our understanding of the developmental changes that occur during top leader elongation in gymnosperms lags behind that in angiosperms. We developed a semiquantitative method for determining epidermal cell size, by measuring the Feret diameter after cell wall staining of stem epidermal peels. This method allowed a large number of cells to be measured at various locations in the top leader of the Ch ...
DOI:
10.1007/s00344-019-09938-5

10. Do Cytokinins and Strigolactones Crosstalk during Drought Adaptation?

Author:
Li, Weiqiang; Herrera-Estrella, Luis; Tran, Lam-Son Phan
Source:
Trends in plant science 2019 v.24 no.8 pp. 669-672
ISSN:
1360-1385
Subject:
cytokinins,   etc   ; acclimation; crops; drought; drought tolerance; signal transduction; strigolactones;     Show all 7 Subjects
Abstract:
... Recent reports have demonstrated that cytokinins (CKs) and strigolactones (SLs) act as negative and positive regulators, respectively, in plant drought responses. These reports have also suggested potential crosstalk between CK and SL signaling pathways in several mechanisms underlying plant drought acclimation. We discuss these reports with a view to potentially exploiting this crosstalk in the d ...
DOI:
10.1016/j.tplants.2019.06.007

11. Cytokinin Inhibits Lateral Root Development at the Earliest Stages of Lateral Root Primordium Initiation in Maize Primary Root

Author:
Márquez, Gonzalo; Alarcón, M. Victoria; Salguero, Julio
Source:
Journal of plant growth regulation 2019 v.38 no.1 pp. 83-92
ISSN:
0721-7595
Subject:
cytokinins,   etc   ; auxins; corn; developmental stages; hormones; root primordia;     Show all 6 Subjects
Abstract:
... Root architecture is basically controlled by auxin and cytokinin, which antagonize in the formation of lateral roots (LRs) along the primary root (PR) axis. Several mechanisms have been proposed to explain the interaction between these two hormones, cytokinin being the hormone that inhibits LR formation. The analysis of the cytokinin effect on LR formation using LRs in several stages of developmen ...
DOI:
10.1007/s00344-018-9811-1

12. Chemical composition of thermally processed coconut water evaluated by GC–MS, UPLC-HRMS, and NMR

Author:
Cunha, Aline G.; Alves Filho, Elenilson G.; Silva, Lorena Mara A.; Ribeiro, Paulo Riceli V.; Rodrigues, Tigressa Helena S.; Brito, Edy S. de; Miranda, Maria Raquel A. de
Source:
Food chemistry 2020 v.324 pp. 126874
ISSN:
0308-8146
Subject:
cytokinins,   etc   ; anthocyanins; chemical composition; chemometrics; coconut water; color; data collection; fructose; gas chromatography-mass spectrometry; glucose; ionization; nuclear magnetic resonance spectroscopy; palmitic acid; procyanidins; secondary metabolites; stearic acid;     Show all 16 Subjects
Abstract:
... Thermally-processed coconut water often develop a commercially-undesirable pink color, thus, NMR, UPLC-HRMS, GC–MS analyses combined with chemometrics approach were applied to evaluate chemical variations in comparison to tender water (control) that could explain such color change. Chemometrics on negative ionization mode dataset showed trimeric and A-type dimeric procyanidins, and caffeoylshikimi ...
DOI:
10.1016/j.foodchem.2020.126874

13. Galling impacts of the gall wasp Leptocybe invasa (Hymenoptera: Eulophidae) on Eucalyptus trees vary with plant genotype

Author:
Xiang, Yao; Guo, Wenfeng; Shen, Si; Gao, Xu; Li, Xiaoqiong
Source:
International journal of tropical insect science 2020 v.40 no.2 pp. 267-275
ISSN:
1742-7592
Subject:
cytokinins,   etc   ; Cynipidae; Eucalyptus; Leptocybe invasa; abscisic acid; carbon; carbon nitrogen ratio; chlorophyll; galls; genotype; gibberellins; leaves; nitrogen; secondary metabolites; tannins; trees;     Show all 16 Subjects
Abstract:
... Impacts of galling on the distributions of plant metabolites can vary greatly with plant genotype. In this study, two Eucalyptus genotypes with different resistance levels were chosen, and the levels of several primary and secondary metabolites, as well as phytohormones in galls and ungalled portions of galled leaves infested by the gall wasp Leptocybe invasa, and gall-free (control) leaves were c ...
DOI:
10.1007/s42690-019-00076-9

14. A Tailored High-Efficiency Sample Pretreatment Method for Simultaneous Quantification of 10 Classes of Known Endogenous Phytohormones

Author:
Xin, Peiyong; Guo, Qiuhuan; Li, Bingbing; Cheng, Shujing; Yan, Jijun; Chu, Jinfang
Source:
Plant communications 2020 v.1 no.3 pp. 100047
ISSN:
2590-3462
Subject:
cytokinins,   etc   ; abscisic acid; auxins; brassinosteroids; ethylene; gibberellins; jasmonic acid; mass spectrometry; physicochemical properties; phytosulfokines; plant tissues; quantitative analysis; salicylic acid; solid phase extraction; strigolactones;     Show all 15 Subjects
Abstract:
... One of the hottest topics in plant hormone biology is the crosstalk mechanisms, whereby multiple classes of phytohormones interplay with each other through signaling networks. To better understand the roles of hormonal crosstalks in their complex regulatory networks, it is of high significance to investigate the spatial and temporal distributions of multiple -phytohormones simultaneously from one ...
DOI:
10.1016/j.xplc.2020.100047

15. Multifaceted Signaling Networks Mediated by Abscisic Acid Insensitive 4

Author:
Chandrasekaran, Umashankar; Luo, Xiaofeng; Zhou, Wenguan; Shu, Kai
Source:
Plant communications 2020 v.1 no.3 pp. 100040
ISSN:
2590-3462
Subject:
cytokinins,   etc   ; abscisic acid; auxins; biogenesis; disease resistance; ethylene; germination; gibberellins; jasmonic acid; lipid metabolism; plant establishment; protein phosphorylation; seed dormancy; signal transduction; transcription (genetics);     Show all 15 Subjects
Abstract:
... Although ABSCISIC ACID INSENSITIVE 4 (ABI4) was initially demonstrated as a key positive regulator in the phytohormone abscisic acid (ABA) signaling cascade, multiple studies have now shown that it is actually involved in the regulation of several other cascades, including diverse phytohormone biogenesis and signaling pathways, various developmental processes (such as seed dormancy and germination ...
DOI:
10.1016/j.xplc.2020.100040

16. Oxidative stress and toxicology of Cu2+ based on surface areas in mixed cultures of green alga and cyanobacteria: The pivotal role of H2O2

Author:
Gallo, Michelle; Morse, David; Hollnagel, Heloisa C.; Barros, Marcelo P.
Source:
Aquatic toxicology 2020 v.222 pp. 105450
ISSN:
0166-445X
Subject:
cytokinins,   etc   ; Cyanobacteria; Dunaliella salina; algae; allelochemicals; antioxidant activity; auxins; copper; heavy metals; hydrogen peroxide; ions; lipid peroxidation; mixed culture; nitric oxide; oxidation; oxidative stress; surface area; toxicity; toxicology;     Show all 19 Subjects
Abstract:
... The toxicity of heavy metals in algal monocultures is well studied and is mediated by reactive oxygen and nitrogen species (ROS/RNS). However, little is known about the toxicity of heavy metals and the mechanisms involved in mixed cultures. Here we examine the oxidative stress and toxic effects of Cu²⁺ on the green alga Dunaliella salina (DS) and the cyanobacteria Synecochoccus elongatus (SE) in b ...
DOI:
10.1016/j.aquatox.2020.105450

17. Transcriptome profiles of phytohormone-related genes in Populus tomentosa vegetative buds from endodormancy to ecodormancy

Author:
Yang, X.Y.; Zhao, T.Y.; Rao, P.; Lei, B.Q.; Khan, W.U.; Gao, K.; Chen, Z.; An, X.M.
Source:
South African journal of botany 2020 v.130 pp. 430-439
ISSN:
0254-6299
Subject:
cytokinins,   etc   ; Populus tomentosa; abscisic acid; auxins; brassinosteroids; buds; dormancy; ethylene; gene expression regulation; gibberellins; hormone metabolism; hormones; perennials; sequence analysis; signal transduction; transcriptome; trees; unigenes;     Show all 18 Subjects
Abstract:
... Bud dormancy activity is a crucial developmental event for growth and survival in woody perennials, and phytohormones play vital roles in this process. In the present study, endodormant and ecodormant vegetative buds were collected from Populus tomentosa and the transcriptomes from two periods were then analyzed and compared using RNA sequencing, aiming at exploring the associations between plant ...
DOI:
10.1016/j.sajb.2020.01.025

18. Cytokinin receptor CRE1 is required for the defense response of Nicotiana tabacum to Chilli veinal mottle virus

Author:
Zou, Wenshan; Chen, Lijuan; Zou, Jialing; Han, Hongyan; Fei, Chunyan; Lin, Honghui; Xi, Dehui
Source:
Plant growth regulation 2020 v.90 no.3 pp. 545-555
ISSN:
0167-6903
Subject:
cytokinins,   etc   ; Chilli veinal mottle virus; Nicotiana tabacum; antioxidants; coat proteins; fungi; genes; metabolism; mutants; pathogenesis-related proteins; pathogens; plant hormones; tobacco; transcription (genetics); viruses;     Show all 15 Subjects
Abstract:
... As an important phytohormone, cytokinins confer resistance of plants to several fungal and bacterial pathogens. However, the discovery of cytokinins in the viral resistance of Nicotiana tabacum is seldom reported. In the current study, we obtained tobacco CRE1 (cytokinin receptor 1) deficient mutants by Agrobacterium-mediated transformation utilizing the recombinant pRNAi-LIC-CRE1. Our conclusions ...
DOI:
10.1007/s10725-020-00579-3

19. Hormonal and gene dynamics in de novo shoot meristem formation during adventitious caulogenesis in cotyledons of Pinus pinea

Author:
Alvarez, José M.; Bueno, Natalia; Cuesta, Candela; Feito, Isabel; Ordás, Ricardo J.
Source:
Plant cell reports 2020 v.39 no.4 pp. 527-541
ISSN:
0721-7714
Subject:
cytokinins,   etc   ; Arabidopsis thaliana; Pinus pinea; adenosine; benzyladenine; caulogenesis; conifers; cotyledons; data collection; dihydrozeatin; gene expression; genes; indole acetic acid; least squares; models; organogenesis; principal component analysis; shoot meristems;     Show all 18 Subjects
Abstract:
... KEY MESSAGE: Several members of WOX and KNOX gene families and several plant growth regulators, basically cytokinins and auxins, play a key role during adventitious caulogenesis in the conifer Pinus pinea. Similar to Arabidopsis thaliana, Pinus pinea shoot organogenesis is a multistep process. However, there are key differences between both species, which may alter the underlying physiological and ...
DOI:
10.1007/s00299-020-02508-0
PubMed:
31993729
PubMed Central:
PMC7067738

20. Non-intrinsic ATP-binding cassette proteins ABCI19, ABCI20 and ABCI21 modulate cytokinin response at the endoplasmic reticulum in Arabidopsis thaliana

Author:
Kim, Areum; Chen, Jilin; Khare, Deepa; Jin, Jun-Young; Yamaoka, Yasuyo; Maeshima, Masayoshi; Zhao, Yunde; Martinoia, Enrico; Hwang, Jae-Ung; Lee, Youngsook
Source:
Plant cell reports 2020 v.39 no.4 pp. 473-487
ISSN:
0721-7714
Subject:
cytokinins,   etc   ; ABC transporters; Arabidopsis thaliana; abscisic acid; auxins; endoplasmic reticulum; growth retardation; hypocotyls; knockout mutants; metabolism; phenotype; phylogeny; seedling growth; seedlings; stress response; transcription factors;     Show all 16 Subjects
Abstract:
... KEY MESSAGE: The non-intrinsic ABC proteins ABCI20 and ABCI21 are induced by light under HY5 regulation, localize to the ER, and ameliorate cytokinin-driven growth inhibition in young Arabidopsis thaliana seedlings. The plant ATP-binding cassette (ABC) I subfamily (ABCIs) comprises heterogeneous proteins containing any of the domains found in other ABC proteins. Some ABCIs are known to function in ...
DOI:
10.1007/s00299-019-02503-0