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1. 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

2. Cytokinin – A Developing Story

Author:
Wybouw, Brecht; De Rybel, Bert
Source:
Trends in plant science 2019 v.24 no.2 pp. 177-185
ISSN:
1360-1385
Subject:
cytokinins,   etc   ; apical meristems; biosynthesis; females; flowers; gametophytes; plant hormones; signal transduction; stomata;     Show all 9 Subjects
Abstract:
... In the past decade tremendous advances have been made in understanding the biosynthesis, perception, and signaling pathways of the plant hormone cytokinin. It also became clear that interfering with any of these steps greatly impacts all on stages of growth and development. This has recently spurted renewed effort to understand how cytokinin signaling affects developmental processes. As a result, ...
DOI:
10.1016/j.tplants.2018.10.012

3. Hormonal interactions during early physiological partenocarpic fruitlet abscission in persimmon (Diospyros Kaki Thunb.) ‘Triumph’ and ‘Shinshu’ cultivars

Author:
Shaya, Felix; David, Israel; Yitzhak, Yiftah; Izhaki, Anat
Source:
Scientia horticulturae 2019 v.243 pp. 575-582
ISSN:
0304-4238
Subject:
cytokinins,   etc   ; Diospyros kaki; abscission; cultivars; flowering; fruit trees; fruits; gibberellic acid; indole acetic acid; persimmons;     Show all 10 Subjects
Abstract:
... Fruitlet abscission is typical to many fruit trees, including persimmon, (Diopyros kaki Thunb.), and often results in unstable fruit production and yield. We documented massive parthenocarpic fruitlet abscission in the persimmon cultivars 'Triumph' and 'Shinshu', which initiated soon after anthesis and peaked at 45 days post anthesis. In contrast, abscission of mature fruitlets 45–65 days after an ...
DOI:
10.1016/j.scienta.2018.08.044

4. The Cytokinin-Activating LOG-Family Proteins Are Not Lysine Decarboxylases

Author:
Naseem, Muhammad; Bencurova, Elena; Dandekar, Thomas
Source:
Trends in biochemical sciences 2018 v.43 pp. 232-236
ISSN:
0968-0004
Subject:
cytokinins,   etc   ; enzyme activity; enzymes; lysine; nucleotides; proteins;     Show all 6 Subjects
Abstract:
... A conserved PGGxGTxxE motif misleads the cytokinin (CK) converting LONELY GUY enzymes to be wrongly annotated as lysine decarboxylases (LDCs). However, so far PGGxGTxxE motif-containing LDCs do not show any LDC activity. Instead, they show phosphoribohydrolase activity by converting inactive CK nucleotides into active free-base forms to invoke CK responses. ...
DOI:
10.1016/j.tibs.2018.01.002

5. New approaches using mass spectrometry to investigate changes to cytokinin and abscisic acid (ABA) concentrations in soil

Author:
High, K.E.; Ashton, P.D.; Nelson, M.; Rylott, E.L.; Thomas-Oates, J.E.; Hodson, M.E.
Source:
Soil biology & biochemistry 2019 v.135 pp. 108-116
ISSN:
0038-0717
Subject:
cytokinins,   etc   ; abscisic acid; auxins; earthworms; growing media; hydroponics; mass spectrometry; monitoring; plant development; plant growth; plant tissues; soil;     Show all 12 Subjects
Abstract:
... Phytohormones such as cytokinins, abscisic acid (ABA) and auxins play a vital role in plant development and regulatory processes. Their role within the plant is a focus for much research, with studies using recent advances in mass spectrometry performance allowing the quantification of low levels of phytohormones extracted from plant tissues. Despite these advances, external factors influencing th ...
DOI:
10.1016/j.soilbio.2019.04.017

6. The influence of different plant hormones on biomass and starch accumulation of duckweed: A renewable feedstock for bioethanol production

Author:
Liu, Yang; Chen, Xiaoyi; Wang, Xinhui; Fang, Yang; Zhang, Yin; Huang, Mengjun; Zhao, Hai
Source:
Renewable energy 2019 v.138 pp. 659-665
ISSN:
0960-1481
Subject:
cytokinins,   etc   ; Araceae; abscisic acid; auxins; benzyladenine; biomass production; brassinosteroids; ethanol production; feedstocks; gibberellins; plant growth; renewable energy sources; starch;     Show all 13 Subjects
Abstract:
... Duckweed has been considered as a renewable feedstock for bioethanol production due to its fast generation of biomass and high starch accumulation. The use of plant hormones is a common and efficient method to manipulate plant growth and yield. However, the effects of different plant hormones on the biomass and starch accumulation of duckweed have not been systematically studied. Here, we screened ...
DOI:
10.1016/j.renene.2019.01.128

7. The bacterial volatile dimethyl-hexa-decylamine reveals an antagonistic interaction between jasmonic acid and cytokinin in controlling primary root growth of Arabidopsis seedlings

Author:
Vázquez-Chimalhua, Ernesto; Ruíz-Herrera, León Francisco; Barrera-Ortiz, Salvador; Valencia-Cantero, Eduardo; López-Bucio, José
Source:
Protoplasma 2019 v.256 no.3 pp. 643-654
ISSN:
0033-183X
Subject:
cytokinins,   etc   ; Arabidopsis; Arthrobacter agilis; bacteria; chemical communication; cotyledons; jasmonic acid; kinetin; microbiome; root growth; root tips; seedlings; volatile organic compounds;     Show all 13 Subjects
Abstract:
... Chemical communication underlies major adaptive traits in plants and shapes the root microbiome. An increasing number of diffusible and/or volatile organic compounds released by bacteria have been identified, which play phytostimulant or protective functions, including dimethyl-hexa-decylamine (DMHDA), a volatile biosynthesized by Arthrobacter agilis UMCV2 that induces jasmonic acid (JA) signaling ...
DOI:
10.1007/s00709-018-1327-9

8. Arabidopsis zinc finger homeodomain protein ZHD5 promotes shoot regeneration and confers other cytokinin-related phenotypes when overexpressed

Author:
Kim, Jin-Baek; Kang, Jung-Youn; Park, Min Young; Song, Mi-ran; Kim, Young Cheol; Kim, Soo Young
Source:
Plant cell, tissue, and organ culture 2019 v.137 no.1 pp. 181-185
ISSN:
0167-6857
Subject:
cytokinins,   etc   ; Arabidopsis; abscisic acid; cell proliferation; gene overexpression; genes; homeodomain proteins; pathogens; phenotype; promoter regions; zinc finger motif;     Show all 11 Subjects
Abstract:
... We present the data showing that overexpression of the Arabidopsis zinc finger homeodomain protein ZHD5 promotes shoot regeneration and confers other cytokinin-associated phenotypes. To isolate protein factors that bind to the promoter element of ABF2, which is a key regulator of ABA responsive gene expression, we carried out yeast-one-hybrid screen. Four zinc finger homeodomain (ZF-HD) protein ge ...
DOI:
10.1007/s11240-018-01546-7

9. Effects of cytokinins, gibberellic acid 3, and gibberellic acid 4/7 on in vitro growth, morphological traits, and content of steviol glycosides in Stevia rebaudiana

Author:
Pazuki, Arman; Aflaki, Fatemeh; Yücesan, Buhara; Gürel, Songül
Source:
Plant physiology and biochemistry 2019 v.137 pp. 154-161
ISSN:
0981-9428
Subject:
cytokinins,   etc   ; Stevia rebaudiana; benzyladenine; biosynthesis; explants; gibberellic acid; glycosides; kinetin; leaf area; leaf length; leaves; steviol; stevioside;     Show all 13 Subjects
Abstract:
... Steviol glycosides (SGs) and gibberellic acids share a part of their biosynthesis pathways. Despite the widespread studies on the effect of gibberellic acid 3 (GA3), the effect of gibberellic acid 4 and 7 (GA4/7) on Stevia rebaudiana has never been studied. This study aimed at a comparative evaluation of different hormone effects, i.e., 1 mg L−1 GA4/7, 1 mg L−1 GA3, or 0.5 mg L−1 kinetin and 0.5 m ...
DOI:
10.1016/j.plaphy.2019.02.009

10. The role of cytokinin in selenium stress response in Arabidopsis

Author:
Jiang, Li; Liu, Changxuan; Cao, Haimei; Chen, Ziping; Yang, Juan; Cao, Shuqing; Wei, Zhaojun
Source:
Plant science 2019 v.281 pp. 122-132
ISSN:
0168-9452
Subject:
cytokinins,   etc   ; Arabidopsis; ascorbate peroxidase; catalase; genes; glutathione; glutathione peroxidase; metabolism; methyltransferases; mutants; reactive oxygen species; selenium; selenocysteine; stress response; transporters;     Show all 15 Subjects
Abstract:
... Cytokinins (CKs) regulate many developmental processes and environmental stress responses in plants. In this study, our data provide evidence that CK negatively regulates Arabidopsis selenium (Se) stress response. CK-deficient plant ipt1 3 5 7 exhibited enhanced Se tolerance which was abolished by exogenous benzylaminopurine (BA) application, while CK- receptor -deficient mutants ahk2 and ahk3 wer ...
DOI:
10.1016/j.plantsci.2019.01.028

11. In Vitro Analyses Reveal the Effect of Synthetic Cytokinin Forchlorfenuron (FCF) on a Septin-Like Protein of Taeniid Cysticerci

Author:
Rios-Valencia, Diana G.; López-Villegas, Edgar O.; Diaz Chiguer, Dylan; Marquez Navarro, Adrian; Díaz-Martín, Ruben D.; Nogueda-Torres, Benjamin; Ambrosio, Javier R.
Source:
Journal of parasitology research 2019 v.2019
ISSN:
2090-0031
Subject:
cytokinins,   etc   ; Taenia crassiceps; Taenia solium; cysticerci; cytoskeleton; exposure duration; forchlorfenuron; genomics; in vitro culture; parasites; polyclonal antibodies; rabbits; synthetic peptides;     Show all 13 Subjects
Abstract:
... Cytokinin forchlorfenuron (FCF), a synthetic cytokinin, has been used specifically for the characterization of septins. In spite of genomic evidence of their existence, nothing is known about septin filaments in taeniid cestodes. The aim of this work was to determine the presence of a septin-like protein in cysticerci of Taenia crassiceps and Taenia solium using the deduced amino acid sequence of ...
DOI:
10.1155/2019/8578936

12. Exogenous application of cytokinin during dark senescence eliminates the acceleration of photosystem II impairment caused by chlorophyll b deficiency in barley

Author:
Janečková, Helena; Husičková, Alexandra; Lazár, Dušan; Ferretti, Ursula; Pospíšil, Pavel; Špundová, Martina
Source:
Plant physiology and biochemistry 2019 v.136 pp. 43-51
ISSN:
0981-9428
Subject:
cytokinins,   etc   ; Hordeum vulgare; barley; benzyladenine; chlorophyll; fluorescence; leaves; mutants; photochemistry; photosystem I; photosystem II; plant hormones; protective effect;     Show all 13 Subjects
Abstract:
... Recent studies have shown that chlorophyll (Chl) b has an important role in the regulation of leaf senescence. However, there is only limited information about senescence of plants lacking Chl b and senescence-induced decrease in photosystem II (PSII) and photosystem I (PSI) function has not even been investigated in such plants. We have studied senescence-induced changes in photosynthetic pigment ...
DOI:
10.1016/j.plaphy.2019.01.005

13. Multifaceted activity of cytokinin in leaf development shapes its size and structure in Arabidopsis

Author:
Skalák, Jan; Vercruyssen, Liesbeth; Claeys, Hannes; Hradilová, Jana; Černý, Martin; Novák, Ondřej; Plačková, Lenka; Saiz‐Fernández, Iñigo; Skaláková, Patricie; Coppens, Frederik; Dhondt, Stijn; Koukalová, Šárka; Zouhar, Jan; Inzé, Dirk; Brzobohatý, Břetislav
Source:
Theplant journal 2019 v.97 no.5 pp. 805-824
ISSN:
0960-7412
Subject:
cytokinins,   etc   ; Arabidopsis; apical meristems; biomass; cell proliferation; chlorosis; genes; leaf development; leaves; photosynthesis; plant hormones; proteome; sugar content; transcriptomics; turgor;     Show all 15 Subjects
Abstract:
... The phytohormone cytokinin has been shown to affect many aspects of plant development ranging from the regulation of the shoot apical meristem to leaf senescence. However, some studies have reported contradictory effects of cytokinin on leaf physiology. Therefore cytokinin treatments cause both chlorosis and increased greening and both lead to decrease or increase in cell size. To elucidate this m ...
DOI:
10.1111/tpj.14285

14. Transcriptome analysis revealed the interaction among strigolactones, auxin, and cytokinin in controlling the shoot branching of rice

Author:
Zha, M.; Imran, M.; Wang, Y.; Xu, J.; Ding, Y.; Wang, Shaohua
Source:
Plant cell reports 2019 v.38 no.3 pp. 279-293
ISSN:
0721-7714
Subject:
cytokinins,   etc   ; auxins; biosynthesis; branching; buds; flavonoids; genes; hormones; messenger RNA; panicles; rice; sequence analysis; signal transduction; strigolactones; transcriptomics;     Show all 15 Subjects
Abstract:
... KEY MESSAGE: Strigolactones inhibit bud growth by negatively regulating the auxin transport without changing the auxin biosynthesis and suppressing the expression of A-ARR in buds. Strigolactones (SLs) are important phytohormones associated with regulation of shoot branching in rice. Rice shoot branching is persuasively mediated by plant hormones like auxin, cytokinins (CKs) and SLs. The interacti ...
DOI:
10.1007/s00299-018-2361-y

15. The use of a hormone-based foliar biostimulant in processing tomatoes

Author:
Smith, P. A.; Argerich, C. A.
Source:
Acta horticulturae 2019 no.1233 pp. 1-6
ISSN:
0567-7572
Subject:
cytokinins,   etc   ; analysis of variance; auxins; complement; evapotranspiration; foliar application; gibberellins; growing season; mulches; plant containers; rowcrops; tomatoes; yields; Argentina;     Show all 14 Subjects
Abstract:
... The use of plant biostimulant products, frequently of a hormone base, has become a common complement to traditional fertilization programs in row crops. The results of the use of these products varies from one formulation to the next, and between growing seasons. A long-term study of a popular biostimulant trademarked Stimulate based on gibberellins, auxins, and cytokinins was deemed necessary to ...
DOI:
10.17660/ActaHortic.2019.1233.1

16. Natural variation in cytokinin maintenance improves salt tolerance in apple rootstocks

Author:
Feng, Yi; Liu, Jing; Zhai, Longmei; Gan, Zengyu; Zhang, Guifen; Yang, Shuhua; Wang, Yi; Wu, Ting; Zhang, Xinzhong; Xu, Xuefeng; Han, Zhenhai
Source:
Plant, cell and environment 2019 v.42 no.2 pp. 424-436
ISSN:
0140-7791
Subject:
cytokinins,   etc   ; apples; biosynthesis; cultivars; genes; proline; promoter regions; roots; rootstocks; salt stress; salt tolerance; screening; stress response;     Show all 13 Subjects
Abstract:
... Plants experiencing salt‐induced stress often reduce cytokinin levels during the early phases of stress‐response. Interestingly, we found that the cytokinin content in the apple rootstock “robusta” was maintained at a high level under salt stress. Through screening genes involved in cytokinin biosynthesis and catabolism, we found that the high expression levels of IPT5b in robusta roots were invol ...
DOI:
10.1111/pce.13403

17. Canonical and noncanonical ethylene signaling pathways that regulate Arabidopsis susceptibility to the cyst nematode Heterodera schachtii

Author:
Piya, Sarbottam; Binder, Brad M.; Hewezi, Tarek
Source:
Thenew phytologist 2019 v.221 no.2 pp. 946-959
ISSN:
0028-646X
Subject:
cytokinins,   etc   ; Arabidopsis; Heterodera schachtii; cyst nematodes; ethylene; immunity; mutants; nematode infections; parasitism; plant response; salicylic acid; signal transduction;     Show all 12 Subjects
Abstract:
... Plant‐parasitic cyst nematodes successfully exploit various phytohormone signaling pathways to establish a new hormonal equilibrium that facilitates nematode parasitism. Although it is largely accepted that ethylene regulates plant responses to nematode infection, a mechanistic understanding of how ethylene shapes plant–nematode interactions remains largely unknown. In this study, we examined the ...
DOI:
10.1111/nph.15400

18. Comparing nursery behavior, field plant yield and fruit quality of in vitro and in vivo propagated strawberry mother plants

Author:
Capocasa, Franco; Balducci, Francesca; Marcellini, Micol; Bernardini, Danilo; Navacchi, Oriano; Mezzetti, Bruno
Source:
Plant cell, tissue, and organ culture 2019 v.136 no.1 pp. 65-74
ISSN:
0167-6857
Subject:
cytokinins,   etc   ; European Union; cultivars; fruits; genetic stability; growers; industry; micropropagation; new variety; phenotype; plant nurseries; strawberries; virus-free plants;     Show all 13 Subjects
Abstract:
... In different countries, mostly in EU, rules for strawberry nursery propagation impose the use of micropropagation only to produce stock virus free plant followed by at least three nursery production cycles in the field before selling these plants to growers. This limit has been imposed by problems concerning true-to-type plants observed in micro-propagated plants of some cultivars, with higher gen ...
DOI:
10.1007/s11240-018-1492-8

19. Effects of hormonal and physical treatments on the expression of a putative chlorophyll b reductase gene (BoNYC1) during postharvest senescence of broccoli

Author:
Reyes Jara, Andrea M.; Gómez-Lobato, María E.; Civello, Pedro M.; Martínez, Gustavo A.
Source:
Postharvest biology and technology 2019 v.147 pp. 107-112
ISSN:
0925-5214
Subject:
cytokinins,   etc   ; 1-methylcyclopropene; air; alcohol dehydrogenase; broccoli; chlorophyll; degreening; ethylene; genes; postharvest treatment; ultraviolet radiation; white light;     Show all 12 Subjects
Abstract:
... Senescence and degreening are the most important features that determine loss of quality during postharvest of broccoli. During senescence, chlorophylls are degraded with the purpose of avoiding presence of photoactive molecules. Chlorophyll b must be previously converted to chlorophyll a in order to be catabolized. This reduction process is catalyzed by two enzymes, chlorophyll b reductase (CBR) ...
DOI:
10.1016/j.postharvbio.2018.09.010

20. The involvement of cytokinin and nitrogen metabolism in delayed flag leaf senescence in a wheat stay-green mutant, tasg1

Author:
Wang, Wenqiang; Hao, Qunqun; Wang, Wenlong; Li, Qinxue; Chen, Fengjuan; Ni, Fei; Wang, Yong; Fu, Daolin; Wu, Jiajie; Wang, Wei
Source:
Plant science 2019 v.278 pp. 70-79
ISSN:
0168-9452
Subject:
cytokinins,   etc   ; ammonium nitrate; benzyladenine; filling period; genes; leaves; lovastatin; mutants; nitrogen content; nitrogen metabolism; seedlings; sequence analysis; wheat;     Show all 13 Subjects
Abstract:
... In the present study on a wheat stay-green mutant, tasg1, we found that its delayed senescence at the late filling stage was related to the high cytokinin (CK) and N contents. RNA sequencing suggested that several genes may be responsible for the different senescence processes between wild-type (WT) and tasg1 plants. WT and tasg1 seedlings were treated with NH4NO3, lovastatin, and 6-benzylaminopur ...
DOI:
10.1016/j.plantsci.2018.10.024