Comparative Analysis of Combined Phosphorus and Drought Stress-responses in Two Winter Wheat

Overview

Journal PeerJ

Specialties Biology
Environmental Health
General Medicine

Date 2022 Sep 28

PMID 36168435

Authors

Xiangchi Zhang

Chao Li

Weidan Lu

Xiaoli Wang

Bin Ma

Kaiyong Fu

Chunyan Li

Cheng Li

Affiliations

Soon will be listed here.

Abstract

Phosphorus stress and drought stress are common abiotic stresses for wheat. In this study, two winter wheat varieties "Xindong20" and "Xindong23" were cultured in a hydroponic system using Hoagland nutrient solution and treated with drought stress under conventional (CP: 1.0 mmol/L) and low (LP: 0.05 mmol/L) phosphorus levels. Under drought stress, the root growth was better under LP than under CP. Under LP, root phosphorus content was increased by 94.2% in Xindong20 and decreased by 48.9% in Xindong23 at 3 d after re-watering, compared with those at 0 d under drought stress. However, the potassium (K) content was the highest among the four elements studied and the phosphorus (P) and calcium (Ca) content were reduced in the root of the two varieties. Under CP, the zinc (Zn) content was higher than that under LP in Xindong23. The GeneChip analysis showed that a total of 4,577 and 202 differentially expressed genes (DEGs) were detected from the roots of Xindong20 and Xindong23, respectively. Among them, 89.9% of DEGs were involved in organelles and vesicles in Xindong20, and 69.8% were involved in root anatomical structure, respiratory chain, electron transport chain, ion transport, and enzyme activity in Xindong23. Overall, LP was superior to CP in mitigating drought stress on wheat, and the regulatory genes were also different in the two varieties. Xindong20 had higher drought tolerance for more up-regulated genes involved in the responses compared to Xindong23.

Citing Articles

Ionomic and metabolic responses of wheat seedlings to PEG-6000-simulated drought stress under two phosphorus levels.

Chunyan L, Xiangchi Z, Chao L, Cheng L PLoS One. 2022; 17(9):e0274915.

PMID: 36126078 PMC: 9488835. DOI: 10.1371/journal.pone.0274915.

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