Unravelling the molecular mechanisms of abscisic acid-mediated drought-stress alleviation in pomegranate (Punica granatum L.)

Qian，Jingjing1; Zhang，Xueping1; Yan，Yan2; Wang，Ning3; Ge，Weiqiang3; Zhou，Qian4; Yang，Yuchen5,6,7

2020-12-01

10.1016/j.plaphy.2020.10.020

PLANT PHYSIOLOGY AND BIOCHEMISTRY   影响因子和分区

0981-9428

Pomegranate (Punica granatum L.), a fruit tree of great economic and nutritional importance, is sensitive to drought stress, which largely affects its transplantation survival rate, fruit yield and quality. Abscisic acid (ABA) treatment can reduce the drought-induced adverse impacts on plants. However, our knowledge on the molecular mechanisms behind ABA-mediated drought tolerance in pomegranates is still limited. In this study, we treated the pomegranates under drought stress with exogenous ABA of different concentrations (30, 60 and 90 μM) and found that, compared to those without treatment, ABA can improve pomegranate's growth condition and related physiological responding processes. We also performed comparative transcriptome analysis between the ABA-treated and untreated pomegranates to reveal the ABA-induced mechanisms in response to drought-stress. Our results showed that exogenous ABA application substantially enhanced pomegranate drought resistance by strengthening some metabolic pathways, such as brassinosteroid synthesis, peroxisome biogenesis, photosynthesis and hemicelluloses synthesis. Furthermore, the over-dose treatment of exogenous ABA was found to trigger ABA degradation process and a feedback loop in pomegranate to balances the ABA accumulation that exceeds the optimal ABA requirement, at the cost of suppressed growth process and stress resistance. Our findings provide new insights into the molecular regulation mechanisms underlying the ABA-mediated drought-stress resistance in pomegranates.

Abscisic acid (ABA) Alleviation Drought stress Pomegranate Transcriptional response

SCI

英语

其他

Young Scientists Fund of the National Natural Science Foundation of China[31801268] ; Key research and development of Chuzhou[2019ZN002]

Plant Sciences

Plant Sciences

WOS:000594130100019

ELSEVIER FRANCE-EDITIONS SCIENTIFIQUES MEDICALES ELSEVIER

PLANT & ANIMAL SCIENCE

2-s2.0-85094583153

Scopus

1.Anhui Science and Technology University,Fengyang,233100,China
2.The Institute of Vegetables and Flowers,Chinese Academy of Agricultural Sciences,Beijing,100081,China
3.Huaiyuan China-Israel Agro-Tech Co.,Ltd.,Bengbu,233400,China
4.Department of Biology,Southern University of Science and Technology,Shenzhen,518055,China
5.Department of Pathology and Laboratory Medicine,University of North Carolina at Chapel Hill,Chapel Hill,27599,United States
6.McAllister Heart Institute,University of North Carolina at Chapel Hill,Chapel Hill,27599,United States
7.Department of Genetics,University of North Carolina at Chapel Hill,Chapel Hill,27599,United States

Qian，Jingjing,Zhang，Xueping,Yan，Yan,et al. Unravelling the molecular mechanisms of abscisic acid-mediated drought-stress alleviation in pomegranate (Punica granatum L.)[J]. PLANT PHYSIOLOGY AND BIOCHEMISTRY,2020,157:211-218.

Qian，Jingjing.,Zhang，Xueping.,Yan，Yan.,Wang，Ning.,Ge，Weiqiang.,...&Yang，Yuchen.(2020).Unravelling the molecular mechanisms of abscisic acid-mediated drought-stress alleviation in pomegranate (Punica granatum L.).PLANT PHYSIOLOGY AND BIOCHEMISTRY,157,211-218.

Qian，Jingjing,et al."Unravelling the molecular mechanisms of abscisic acid-mediated drought-stress alleviation in pomegranate (Punica granatum L.)".PLANT PHYSIOLOGY AND BIOCHEMISTRY 157(2020):211-218.