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Pre-drought priming sustains grain development under post-anthesis drought stress by regulating the growth hormones in winter wheat (Triticum aestivum L.).
Planta 2017; 246(3):509-524P

Abstract

MAIN CONCLUSION

Drought stress during grain filling is the most yield-damaging to wheat. Pre-drought priming facilitated the wheat plants to sustain grain development against the post-anthesis drought stress by modulating the levels of growth hormones. Post-anthesis drought stress substantially reduces grain yield in wheat (Triticum aestivum L.) due to impaired grain development associated with imbalanced levels of growth hormones. To investigate whether pre-drought priming could sustain grain development in wheat by regulating favorable levels of growth hormones under post-anthesis drought conditions, the plants of a drought-sensitive (Yangmai-16) and drought-tolerant (Luhan-7) wheat cultivar were exposed to a moderate drought stress during tillering (Feekes 2 stage) for priming, and then, a subsequent severe drought stress was applied from 7 to 14 days after anthesis. The results showed that drought-stressed plants of both cultivars showed a decline in flag leaf water potential, chlorophyll contents, photosynthetic rate, grain size initiation, and grain filling as compared to well-watered plants; however, decline in these traits was less in pre-drought primed (PD) plants than in nonprimed (ND) plants. Under drought stress, the PD plants regulated higher concentrations of zeatin and zeatin riboside, indole-3-acetic acid, gibberellins, and lower abscisic acid content in grains, resulting in higher endosperm cell division and expansion, grain size initiation, grain-filling rate and duration, and finally higher grain dry weights as compared to ND plants. The PD plants of both cultivars showed higher potential to tolerate the post-anthesis drought stress, but more effect was displayed by drought-tolerant cultivar. From the achieved results, it was concluded that pre-drought priming facilitated the wheat plants to sustain higher grain development and yield against the most yield-damaging post-anthesis drought stress by modulating the levels of growth hormones.

Authors+Show Affiliations

Key Laboratory of Crop Physiology, Ecology and Production Management, Nanjing Agricultural University, Nanjing, 210095, Jiangsu, People's Republic of China. Department of Soil and Water Conservation, Soon Valley, Khushab, Punjab, 41000, Pakistan.Key Laboratory of Crop Physiology, Ecology and Production Management, Nanjing Agricultural University, Nanjing, 210095, Jiangsu, People's Republic of China.Key Laboratory of Crop Physiology, Ecology and Production Management, Nanjing Agricultural University, Nanjing, 210095, Jiangsu, People's Republic of China.Key Laboratory of Crop Physiology, Ecology and Production Management, Nanjing Agricultural University, Nanjing, 210095, Jiangsu, People's Republic of China.Key Laboratory of Crop Physiology, Ecology and Production Management, Nanjing Agricultural University, Nanjing, 210095, Jiangsu, People's Republic of China.Key Laboratory of Crop Physiology, Ecology and Production Management, Nanjing Agricultural University, Nanjing, 210095, Jiangsu, People's Republic of China.Key Laboratory of Crop Physiology, Ecology and Production Management, Nanjing Agricultural University, Nanjing, 210095, Jiangsu, People's Republic of China.Key Laboratory of Crop Physiology, Ecology and Production Management, Nanjing Agricultural University, Nanjing, 210095, Jiangsu, People's Republic of China. tingbod@njau.edu.cn.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

28526982

Citation

Abid, Muhammad, et al. "Pre-drought Priming Sustains Grain Development Under Post-anthesis Drought Stress By Regulating the Growth Hormones in Winter Wheat (Triticum Aestivum L.)." Planta, vol. 246, no. 3, 2017, pp. 509-524.
Abid M, Shao Y, Liu S, et al. Pre-drought priming sustains grain development under post-anthesis drought stress by regulating the growth hormones in winter wheat (Triticum aestivum L.). Planta. 2017;246(3):509-524.
Abid, M., Shao, Y., Liu, S., Wang, F., Gao, J., Jiang, D., ... Dai, T. (2017). Pre-drought priming sustains grain development under post-anthesis drought stress by regulating the growth hormones in winter wheat (Triticum aestivum L.). Planta, 246(3), pp. 509-524. doi:10.1007/s00425-017-2698-4.
Abid M, et al. Pre-drought Priming Sustains Grain Development Under Post-anthesis Drought Stress By Regulating the Growth Hormones in Winter Wheat (Triticum Aestivum L.). Planta. 2017;246(3):509-524. PubMed PMID: 28526982.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Pre-drought priming sustains grain development under post-anthesis drought stress by regulating the growth hormones in winter wheat (Triticum aestivum L.). AU - Abid,Muhammad, AU - Shao,Yuhang, AU - Liu,Sixi, AU - Wang,Feng, AU - Gao,Jingwen, AU - Jiang,Dong, AU - Tian,Zhongwei, AU - Dai,Tingbo, Y1 - 2017/05/19/ PY - 2017/01/25/received PY - 2017/04/13/accepted PY - 2017/5/21/pubmed PY - 2018/8/17/medline PY - 2017/5/21/entrez KW - Grain development KW - Plant growth hormones KW - Post-anthesis drought stress KW - Pre-drought priming KW - Winter wheat (Triticum aestivum) SP - 509 EP - 524 JF - Planta JO - Planta VL - 246 IS - 3 N2 - MAIN CONCLUSION: Drought stress during grain filling is the most yield-damaging to wheat. Pre-drought priming facilitated the wheat plants to sustain grain development against the post-anthesis drought stress by modulating the levels of growth hormones. Post-anthesis drought stress substantially reduces grain yield in wheat (Triticum aestivum L.) due to impaired grain development associated with imbalanced levels of growth hormones. To investigate whether pre-drought priming could sustain grain development in wheat by regulating favorable levels of growth hormones under post-anthesis drought conditions, the plants of a drought-sensitive (Yangmai-16) and drought-tolerant (Luhan-7) wheat cultivar were exposed to a moderate drought stress during tillering (Feekes 2 stage) for priming, and then, a subsequent severe drought stress was applied from 7 to 14 days after anthesis. The results showed that drought-stressed plants of both cultivars showed a decline in flag leaf water potential, chlorophyll contents, photosynthetic rate, grain size initiation, and grain filling as compared to well-watered plants; however, decline in these traits was less in pre-drought primed (PD) plants than in nonprimed (ND) plants. Under drought stress, the PD plants regulated higher concentrations of zeatin and zeatin riboside, indole-3-acetic acid, gibberellins, and lower abscisic acid content in grains, resulting in higher endosperm cell division and expansion, grain size initiation, grain-filling rate and duration, and finally higher grain dry weights as compared to ND plants. The PD plants of both cultivars showed higher potential to tolerate the post-anthesis drought stress, but more effect was displayed by drought-tolerant cultivar. From the achieved results, it was concluded that pre-drought priming facilitated the wheat plants to sustain higher grain development and yield against the most yield-damaging post-anthesis drought stress by modulating the levels of growth hormones. SN - 1432-2048 UR - https://www.unboundmedicine.com/medline/citation/28526982/Pre_drought_priming_sustains_grain_development_under_post_anthesis_drought_stress_by_regulating_the_growth_hormones_in_winter_wheat__Triticum_aestivum_L___ L2 - https://dx.doi.org/10.1007/s00425-017-2698-4 DB - PRIME DP - Unbound Medicine ER -