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1. Leaf anatomical features of the Eriosema campestre Benth. (Leguminosae, Papilionoideae, Phaseoleae) complex and potential taxonomic implications

Author:
Pacheco Seixas, Diana; Fortuna-Perez, Ana Paula; Rodrigues, Tatiane Maria
Source:
Flora 2019 v.253 pp. 107-115
ISSN:
0367-2530
Subject:
phloem,   etc   ; Eriosema; herbaria; morphs; petioles; trichomes;     Show all 6 Subjects
Abstract:
... Identification of taxa of the Eriosema campestre Benth. (Leguminosae, Papilionoideae, Phaseoleae) complex has proven difficult due to their morphological uniformity. Eriosema campestre is currently considered to comprise three varieties (E. campestre var. campestre, E. campestre var. delicatula Fortunato and E. campestre var. macrophyllum (Grear) Fortunato), which are mainly distinguished by chara ...
DOI:
10.1016/j.flora.2019.03.011

2. Drought impacts on phloem transport

Author:
Sevanto, Sanna
Source:
Current opinion in plant biology 2018 v.43 pp. 76-81
ISSN:
1369-5266
Subject:
phloem,   etc   ; drought; prediction; xylem;     Show all 4 Subjects
Abstract:
... Drought impacts on phloem transport have attracted attention only recently, despite the well-established, and empirically verified theories on drought impacts on water transport in plants in general. This is because studying phloem transport is challenging. Phloem tissue is relatively small and delicate, and it has often been assumed not to be impacted by drought, or having insignificant impact on ...
DOI:
10.1016/j.pbi.2018.01.002

3. Distribution and re-transportation of sodium in three Malus species with different salt tolerance

Author:
Yang, Hong-Bing; Yu, Yan-Chong; Wang, Yi; Xu, Xue-Feng; Han, Zhen-Hai
Source:
Plant physiology and biochemistry 2019 v.136 pp. 162-168
ISSN:
0981-9428
Subject:
phloem,   etc   ; Malus; extrusion; leaves; roots; salt tolerance; sodium; xylem;     Show all 8 Subjects
Abstract:
... To further dissect the mechanism of salt tolerance in Malus, the comparison was made regarding the differences between the salt-tolerant and salt-sensitive species in sodium accumulation and extrusion capability in the roots and stem base as well as the sodium re-transportation from shoot to roots by using 22Na labeling-based feeding of leaves and roots-split experiments. The results demonstrated ...
DOI:
10.1016/j.plaphy.2019.01.022

4. Stiffness variability analysis of maize fiber bundles via multiscale simulation

Author:
Huang, Jiale; Liu, Wangyu; Zhou, Feng; Peng, Yujian
Source:
Journal of materials science 2017 v.52 no.13 pp. 7917-7928
ISSN:
0022-2461
Subject:
phloem,   etc   ; cell walls; corn;     Show all 3 Subjects
Abstract:
... The objective of this study was to analyze the stiffness variation of maize fiber bundles. Tensile modulus of fiber bundle was calculated by using a multiscale simulation. Fiber bundle cross section was reconstructed by the skeletonization method. The influences of the cell wall thickness, the microfibril angle (MFA) in S2 layer and the fiber diameter on the tensile modulus of retted maize bundles ...
DOI:
10.1007/s10853-017-0996-7

5. Consequences of phloem pathway unloading/reloading on equilibrium flows between source and sink: a modelling approach

Author:
Minchin, Peter E. H.; Lacointe, André
Source:
Functional plant biology 2017 v.44 no.5 pp. 507-514
ISSN:
1445-4408
Subject:
phloem,   etc   ; models; solutes;     Show all 3 Subjects
Abstract:
... It is now accepted that the transport phloem, linking major sources and sinks, is leaky, and this leakage can be considerable. Hence for phloem transport to function over the long distances observed, a large fraction of this unloaded photosynthate must be reloaded. A fraction of this unloaded solute is used to maintain tissues surrounding the phloem, as well as being stored. Also, pathway unloadin ...
DOI:
10.1071/FP16354

6. Mechanisms of phloem unloading: shaped by cellular pathways, their conductances and sink function

Author:
Milne, Ricky J; Grof, Christopher PL; Patrick, John W
Source:
Current opinion in plant biology 2018 v.43 pp. 8-15
ISSN:
1369-5266
Subject:
phloem,   etc   ; models; plasma membrane; plasmodesmata; sugars;     Show all 5 Subjects
Abstract:
... Phloem unloading represents a series of cell-to-cell transport steps transferring phloem-mobile constituents from phloem to sink tissues/organs to fuel their development or resource storage. Our analysis focuses on unloading of two major phloem-mobile constituents, sugars and water. Their unloading can occur across phloem plasma membranes (apoplasmic unloading), through plasmodesmata interconnecti ...
DOI:
10.1016/j.pbi.2017.11.003

7. Phloem function: a key to understanding and manipulating plant responses to rising atmospheric [CO2]?

Author:
Ainsworth, Elizabeth A; Lemonnier, Pauline
Source:
Current opinion in plant biology 2018 v.43 pp. 50-56
ISSN:
1369-5266
Subject:
phloem; phloem loading,   etc   ; C3 plants; carbon dioxide; enzymes; photosynthesis; plant response; stomatal conductance; sucrose; transporters;     Show all 10 Subjects
Abstract:
... Increasing atmospheric carbon dioxide concentration ([CO2]) directly stimulates photosynthesis and reduces stomatal conductance in C3 plants. Both of these physiological effects have the potential to alter phloem function at elevated [CO2]. Recent research has clearly established that photosynthetic capacity is correlated to vascular traits associated with phloem loading and water transport, but t ...
DOI:
10.1016/j.pbi.2017.12.003

8. Sucrose transporters and plasmodesmal regulation in passive phloem loading

Author:
Liesche, Johannes
Source:
Journal of integrative plant biology 2017 v.59 no.5 pp. 311-321
ISSN:
1672-9072
Subject:
phloem; phloem loading,   etc   ; carbon; leaves; sucrose; transporters; trees;     Show all 7 Subjects
Abstract:
... An essential step for the distribution of carbon throughout the whole plant is the loading of sugars into the phloem in source organs. In many plants, accumulation of sugars in the sieve element‐companion cell (SE‐CC) complex is mediated and regulated by active processes. However, for poplar and many other tree species, a passive symplasmic mechanism of phloem loading has been proposed, characteri ...
DOI:
10.1111/jipb.12548

9. Development of successive cambia and formation of secondary xylem in Suaeda nudiflora and S. fruticosa (Amaranthaceae s.l.)

Author:
Shelke, R.A.; Kapadane, K.K.; Ramoliya, D.G.; Gondaliya, A.D.; Rajput, Kishore S.
Source:
Flora 2019 v.256 pp. 43-51
ISSN:
0367-2530
Subject:
secondary phloem,   etc   ; Phytolaccaceae; Suaeda; cambium; secondary xylem; sieve elements; starch; stems; vascular bundles;     Show all 9 Subjects
Abstract:
... Amaranthaceae s.l. and its allied families like Amaranthaceae s.s., Chenopodiaceae s.s. and Phytolaccaceae s.s. are always debated in the literature about their pattern of secondary growth; when their stem diameter increases by forming successive cambia. In the present study, development of successive cambia and differentiation of its derivatives was investigated in Suaeda fruticosa and S. nudiflo ...
DOI:
10.1016/j.flora.2019.04.006

10. In situ histochemical localization of alkaloids in leaves and pods of Prosopis ruscifolia

Author:
Gomez, Analía A.; Mercado, María I.; Belizán, María M.E.; Ponessa, Graciela; Vattuone, Marta A.; Sampietro, Diego A.
Source:
Flora 2019 v.256 pp. 1-6
ISSN:
0367-2530
Subject:
phloem,   etc   ; Prosopis ruscifolia; anti-infective agents; indolizidine alkaloids; petioles; pods; spraying; trees; trichomes;     Show all 9 Subjects
Abstract:
... The tree Prosopis ruscifolia produces indolizidine alkaloids which function in plant defense as antimicrobials. Here, we propose the use of Drangendorff´s reagent, picric acid and lugol for the in situ histochemical localization of indolizidine alkaloids in the leaf parts (petiole, rachis and leaflet) and pods of P. ruscifolia. The main surface and internal anatomical features of the aerial plant ...
DOI:
10.1016/j.flora.2019.04.008

11. Efficient phloem transport significantly remobilizes cadmium from old to young organs in a hyperaccumulator Sedum alfredii

Author:
Hu, Yan; Tian, Shengke; Foyer, Christine H.; Hou, Dandi; Wang, Haixin; Zhou, Weiwei; Liu, Ting; Ge, Jun; Lu, Lingli; Lin, Xianyong
Source:
Journal of hazardous materials 2019 v.365 pp. 421-429
ISSN:
0304-3894
Subject:
phloem,   etc   ; Sedum; X-radiation; cadmium; ecotypes; fluorescence; hyperaccumulators; leaves; stems; xylem;     Show all 10 Subjects
Abstract:
... Our knowledge of cadmium (Cd) in hyperaccumulators mainly concerns root uptake, xylem translocation and foliar detoxification, while little attention has been paid to the role of phloem remobilization. We investigated Cd distribution in different organs of the hyperaccumulating ecotype (HE) of Sedum alfredii and compared its Cd phloem transport with that of the non-hyperaccumulating ecotype (NHE). ...
DOI:
10.1016/j.jhazmat.2018.11.034

12. The linker length of glucose–fipronil conjugates has a major effect on the rate of bioactivation by β‐glucosidase

Author:
Wen, Yingjie; Jiang, Xunyuan; Yang, Chen; Meng, Huayue; Wang, Binfeng; Wu, Hanxiang; Zhang, Zhixiang; Xu, Hanhong
Source:
Pest management science 2019 v.75 no.3 pp. 708-717
ISSN:
1526-498X
Subject:
phloem,   etc   ; Plutella xylostella; active sites; beta-glucosidase; bioassays; computer simulation; fipronil; hydrolysis; insecticidal properties; larvae; models;     Show all 11 Subjects
Abstract:
... BACKGROUND: Endogenous plant β‐glucosidases can be utilized to hydrolyze pro‐pesticides and release the bioactive pesticide. Two related glucose–fipronil conjugates with different linkers structure, N‐{3‐cyano‐1‐[2,6‐dichloro‐4‐(trifluoromethyl) phenyl]‐4‐[(trifluoromethyl) sulfinyl]‐1H‐pyrazol‐5‐yl}‐1‐(2‐triazolethyl‐β‐d‐glucopyranoside)‐1H‐1,2,3‐triazole‐4‐methanamine (GOTF) and N‐{3‐cyano‐1‐[2, ...
DOI:
10.1002/ps.5170

13. Variation rule of EDTA-Na2 in grape shoots based on trellis and phenological period

Author:
Nan, Lijun; Li, Yashan; Huang, Jing; Liu, Liyuan; Cui, Changwei; Xu, Chengdong; Wang, Hua; Li, Hua
Source:
Scientia horticulturae 2019 v.246 pp. 849-857
ISSN:
0304-4238
Subject:
phloem,   etc   ; EDTA (chelating agent); Vitis; ethylenediamines; exudation; grapes; phenology; sap; shoots; vines;     Show all 10 Subjects
Abstract:
... To better understand the physiological processes involved in responses of trellises to the transportation and distribution of nutrient within shoots of grapevines, analysis method of disodium ethylenediamine tetraacetate (EDTA - Na2) was employed at the whole development stages of vine. In the trial, the traditional independent long-stem pruning (ILSP) was taken as control to compare the effect of ...
DOI:
10.1016/j.scienta.2018.11.051

14. Occurrence in Brazil of Haplaxius crudus (Hemiptera: Cixiidae), Vector of Coconut Lethal Yellowing

Author:
Silva, F G; Passos, E M; Diniz, L E C; Teodoro, A V; Talamini, V; Fernandes, M F; Dollet, M
Source:
Neotropical entomology 2019 v.48 no.1 pp. 171-174
ISSN:
1519-566X
Subject:
phloem,   etc   ; Cixiidae; Phytoplasma; coconuts; hybrids; industry; leaves; lethal yellowing; plantations; risk; traps; Brazil;     Show all 12 Subjects
Abstract:
... The lethal yellowing (LY) is a major phytoplasma causing disease seriously threatening coconut plantations worldwide, with imminent risk of entering Brazil. The LY phytoplasma is restricted to the phloem and transmitted by the planthopper Haplaxius crudus (Van Duzee) (Cixiidae). In this study, Auchenorrhyncha were collected on the leaves of Dwarf vs. Dwarf hybrids and Brazilian Green Dwarf Jiqui i ...
DOI:
10.1007/s13744-018-0663-y

15. Influence of cambial age on the bark structure of Douglas-fir

Author:
Cardoso, Sofia; Quilhó, Teresa; Pereira, Helena
Source:
Wood science and technology 2019 v.53 no.1 pp. 191-210
ISSN:
0043-7719
Subject:
phloem,   etc   ; Pseudotsuga menziesii; bark; biometry; cambium; conifers; cork; periderm; sawmilling industry; suberization; trees; Portugal;     Show all 12 Subjects
Abstract:
... Douglas-fir (Pseudotsuga menziesii) is a valuable conifer timber species. It has a thick bark with a high proportion of cork in the rhytidome that allows considering its recovery. This study focuses on the characterization of the bark features and their variation with cambial age along the stem using samples of 20 trees from two sites in Portugal at harvest for the sawmilling industry. The morphol ...
DOI:
10.1007/s00226-018-1055-5

16. Mechanical contribution of secondary phloem to postural control in trees: the bark side of the force

Author:
Clair, Bruno; Ghislain, Barbara; Prunier, Jonathan; Lehnebach, Romain; Beauchêne, Jacques; Alméras, Tancrède
Source:
Thenew phytologist 2019 v.221 no.1 pp. 209-217
ISSN:
0028-646X
Subject:
secondary phloem,   etc   ; bark; cell walls; gravity; mature plants; mechanical stress; posture; saplings; stems; turgor; wood;     Show all 11 Subjects
Abstract:
... To grow straight, plants need a motor system that controls posture by generating forces to offset gravity. This motor function in trees was long thought to be only controlled by internal forces induced in wood. Here we provide evidence that bark is involved in the generation of mechanical stresses in several tree species. Saplings of nine tropical species were grown tilted and staked in a shadehou ...
DOI:
10.1111/nph.15375

17. Arabidopsis Type I Proton-Pumping Pyrophosphatase Expresses Strongly in Phloem, Where It Is Required for Pyrophosphate Metabolism and Photosynthate Partitioning

Author:
Pizzio, Gaston A.; Paez-Valencia, Julio; Khadilkar, Aswad S.; Regmi, Kamesh; Patron-Soberano, Araceli; Zhang, Shangji; Sanchez-Lares, Jonathan; Furstenau, Tara; Li, Jisheng; Sanchez-Gomez, Concepcion; Valencia-Mayoral, Pedro; Yadav, Umesh P.; Ayre, Brian G.; Gaxiola, Roberto A.
Source:
Plant physiology 2015 v.167 no.4 pp. 1541-1553
ISSN:
0032-0889
Subject:
phloem; phloem loading,   etc   ; Arabidopsis; metabolism;     Show all 4 Subjects
Abstract:
... The type I H ⁺-PPase is a key component of the sieve element-companion cell complexes and involved in phloem loading in Arabidopsis. ...
DOI:
10.1104/pp.114.254342
PubMed:
25681328
PubMed Central:
PMC4378163

18. Measurement of grape root firmness and its application to the evaluation of cold hardiness

Author:
Gao, Z.; Zhai, H.; Du, Y.‐P.
Source:
Australian journal of grape and wine research 2018 v.24 no.4 pp. 406-412
ISSN:
1322-7130
Subject:
phloem,   etc   ; cold tolerance; cultivars; cutting; firmness; grapes; texture; xylem;     Show all 8 Subjects
Abstract:
... BACKGROUND AND AIMS: In this study, the cutting force and work to cut 12 grape cultivars with different cold hardiness were measured with a texture analyser to examine root firmness and its application to the evaluation of cold hardiness. METHODS AND RESULTS: The transverse cut method involved cutting in a direction perpendicular to vascular orientation, and the longitudinal cut method involved cu ...
DOI:
10.1111/ajgw.12345

19. RNA on the move: The plasmodesmata perspective

Author:
Reagan, Brandon C.; Ganusova, Elena E.; Fernandez, Jessica C.; McCray, Tyra N.; Burch-Smith, Tessa M.
Source:
Plant science 2018 v.275 pp. 1-10
ISSN:
0168-9452
Subject:
phloem,   etc   ; cell communication; messenger RNA; metabolism; organelles; plasmodesmata; proteins;     Show all 7 Subjects
Abstract:
... It is now widely accepted that plant RNAs can have effects at sites far away from their sites of synthesis. Cellular mRNA transcripts, endogenous small RNAs and defense-related small RNAs all move from cell to cell via plasmodesmata (PD), and may even move long distances in the phloem. Despite their small size, PD have complicated substructures, and the area of the pore available for RNA trafficki ...
DOI:
10.1016/j.plantsci.2018.07.001

20. Cambial patterns of Paullinia (Sapindaceae) in southwestern Amazonia, Brazil

Author:
Pellissari, Lauany Cristina Olazar; Barros, Claudia Franca; Medeiros, Herison; Tamaio, Neusa
Source:
Flora 2018 v.246-247 pp. 71-82
ISSN:
0367-2530
Subject:
phloem,   etc   ; Paullinia; cambium; forests; taxon descriptions; xylem; Amazonia; Brazil;     Show all 8 Subjects
Abstract:
... Paullinia comprises 220 species. In Brazil, there are 99 species of the genus distributed mainly in Amazonian forest and the Atlantic Forest, where there are 73 and 26 species, respectively. Until now, the stem anatomy of only 13 species of Paullinia has been investigated. Given the importance of information on cambial variants to the taxonomy of Sapindaceae, studies on the stem anatomy of species ...
DOI:
10.1016/j.flora.2018.07.002