Cytokinin and gibberellic acid-mediated waterlogging tolerance of mungbean ( Vigna radiata L. Wilczek)

PeerJ

article

M. Rafiqul Islam¹  Mezanur Rahman²  Mohammed Mohi-Ud-Din³  Munny Akter¹  Erin Zaman¹  Sanjida Sultana Keya²  Mehfuz Hasan⁴  Mirza Hasanuzzaman⁵ 

[1] Department of Agronomy, Bangabandhu Sheikh Mujibur Rahman Agricultural University;Institute of Genomics for Crop Abiotic Stress Tolerance, Department of Plant and Soil Science, Texas Tech University;Department of Crop Botany, Bangabandhu Sheikh Mujibur Rahman Agricultural University;Department of Genetic and Plant Breeding, Bangabandhu Sheikh Mujibur Rahman Agricultural University;Department of Agronomy, Sher-e-Bangla Agricultural University

关键词: Antioxidants;    Hypoxia;    Osmoprotectants;    Phytohormone;    Pulse crop;    Photosynthesis;    Reactive oxygen species;    Yield;   

DOI  :  10.7717/peerj.12862

学科分类：社会科学、人文和艺术（综合）

来源: Inra

【 摘 要 】

Background Mungbean (Vigna radiata L. Wilczek) is one of the most important pulse crops, well-known for its protein-rich seeds. Growth and productivity are severely undermined by waterlogging. Methods In this study, we aim to evaluate how two promising phytohormones, namely cytokinin (CK) and gibberellic acid (GA3), can improve waterlogging tolerance in mungbean by investigating key morphological, physiological, biochemical, and yield-related attributes. Results Our results showed that foliar application of CK and GA3 under 5-day of waterlogged conditions improved mungbean growth and biomass, which was associated with increased levels of photosynthetic rate and pigments. Waterlogged-induced accumulation of reactive oxygen species and the consequently elevated levels of malondialdehyde were considerably reduced by CK and GA3 treatments. Mungbean plants sprayed with either CK or GA3 suffered less oxidative stress due to the enhancement of total phenolics and flavonoids levels. Improvement in the contents of proline and total soluble sugars indicated a better osmotic adjustment following CK and GA3 treatments in waterlogged‐exposed plants. Most fundamentally, CK or GA3-sprayed waterlogged-stressed mungbean plants demonstrated better performance in the aforementioned parameters after the 15-day recovery period as compared to water-sprayed waterlogged-exposed plants. Our results also revealed that CK and GA3 treatments increased yield-associated features in the waterlogged-stressed plant. Here, both phytohormones are efficient in improving mungbean resistance to waterlogging. However, CK was found to be more effective. Overall, our findings suggested that CK or GA3 could be used for managing waterlogging-induced damage to mungbean and perhaps in other cash crops.

【 授权许可】

CC BY