Role of abscisic acid in legumes under abiotic stress

Llanes, Analía; Devinar, Genoveva; Luna, Virginia

doi:10.1002/9781118917091.ch10

Cited by 4 publications

(2 citation statements)

References 150 publications

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“…However, in this study, high RBD index coincided with high DPA concentration. Although the biological activity of DPA has been indicated to be low or non‐existence, this study suggests that DPA could be playing an important correlative role in RBD development.…”

Section: Resultsmentioning

confidence: 99%

Investigating the involvement of ABA, ABA catabolites and cytokinins in the susceptibility of ‘Nules Clementine’ mandarin to rind breakdown disorder

et al. 2019

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BACKGROUND ‘Nules Clementine’ mandarin was used to investigate the potential involvement of endogenous plant hormones in mediating citrus fruit susceptibility to rind breakdown disorder (RBD). The effect of light exposure (namely canopy position and bagging treatments) on the endogenous concentration of ABA, 7′‐hydroxy‐abscisic acid (7‐OH‐ABA), ABA‐glucose ester (ABA‐GE) and dihydrophaseic acid (DPA), and t‐zeatin was tested using four preharvest treatments: outside, outside bagged, inside and inside bagged. Phytohormones concentration was evaluated during nine weeks of postharvest storage at 8 °C. RESULTS The shaded fruit inside the canopy had the highest RBD score (0.88) at the end of postharvest storage, while sun‐exposed fruit had the lowest score (0.12). Before storage, ABA concentration was lowest (462.8 µg kg−1) for inside fruit, and highest in outside bagged fruit (680.5 µg kg−1). Although ABA concentration suddenly increased from the third week, reaching a maximum concentration of 580 µg kg−1 at week 6 in fruit from inside position, it generally reduced 1.6‐fold ranging from 240.52 to 480.65 µg kg−1 throughout storage. The increase of 7‐OH‐ABA was more prominent in fruit from inside canopy. Overall, the concentration of ABA‐GE increased three‐fold with storage time. DPA concentration of bagged fruit from inside canopy position was significantly higher compared to outside fruit. The lower ABA‐GE and higher DPA concentration in inside bagged fruit throughout storage also coincided with higher RBD. CONCLUSION The strong positive correlations between 7‐OH‐ABA, DPA and RBD incidence demonstrated that these ABA catabolites could be used as biomarkers for fruit susceptibility to the disorder. © 2019 Society of Chemical Industry

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Section: Resultsmentioning

confidence: 99%

Investigating the involvement of ABA, ABA catabolites and cytokinins in the susceptibility of ‘Nules Clementine’ mandarin to rind breakdown disorder

et al. 2019

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“…PP2C genes are key regulators of abscisic acid signal transduction in A. thaliana , acting as “gatekeepers” of downstream abscisic acid responses through interactions with protein kinases of subclass III SnRK2s (Umezawa et al., 2009). Abscisic acid is a phytohormone that regulates plant growth and development and has important roles in stress signaling and response (Llanes et al., 2015; Tuteja, 2014). Studies of PP2C in legume species such as G. soja and M. truncatula indicate many genes within different PP2C subfamily are differentially expressed in response to salt, cold, and drought stress (Chen et al., 2017; Yang et al., 2018).…”

Section: Discussionmentioning

confidence: 99%

Legume‐wide comparative analysis of pod shatter locus PDH1 reveals phaseoloid specificity, high cowpea expression, and stress responsive genomic context

et al. 2023

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Pod dehiscence is a major source of yield loss in legumes, which is exacerbated by aridity. Disruptive mutations in "Pod indehiscent 1" (PDH1), a pod sclerenchyma-specific lignin biosynthesis gene, has been linked to significant reductions in dehiscence in several legume species. We compared syntenic PDH1 regions across 12 legumes and two outgroups to uncover key historical evolutionary trends at this important locus. Our results clarified the extent to which PDH1 orthologs are present in legumes, showing the typical genomic context surrounding PDH1 has only arisen relatively recently in certain phaseoloid species (Vigna, Phaseolus, Glycine). The notable absence of PDH1 in Cajanus cajan may be a major contributor to its indehiscent phenotype compared with other phaseoloids. In addition, we identified a novel PDH1 ortholog in Vigna angularis and detected remarkable increases in PDH1 transcript abundance during Vigna unguiculata pod development. Investigation of the shared genomic context of PDH1 revealed it lies in a hotspot of transcription factors and signaling gene families that respond to abscisic acid and drought stress, which we hypothesize may be an additional factor influencing expression of PDH1 under specific environmental conditions. Our findings provide key insights into the evolutionary history of PDH1 and lay the foundation for optimizing the pod dehiscence role of PDH1 in major and understudied legume species.

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Triacontanol is a potent alleviator of stress induced by salt and heavy metal contamination in plants

Jahan,

Rautela,

Chishti

et al. 2023

Rhizosphere

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Role of abscisic acid in legumes under abiotic stress

Cited by 4 publications

References 150 publications

Investigating the involvement of ABA, ABA catabolites and cytokinins in the susceptibility of ‘Nules Clementine’ mandarin to rind breakdown disorder

Investigating the involvement of ABA, ABA catabolites and cytokinins in the susceptibility of ‘Nules Clementine’ mandarin to rind breakdown disorder

Legume‐wide comparative analysis of pod shatter locus PDH1 reveals phaseoloid specificity, high cowpea expression, and stress responsive genomic context

Triacontanol is a potent alleviator of stress induced by salt and heavy metal contamination in plants

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