Physiological and yield responses of soybean under water deficit

被引:2
作者
Felisberto, Guilherme [1 ]
Schwerz, Felipe [2 ]
Umburanas, Renan Caldas [1 ,3 ]
Dourado-Neto, Durval [1 ]
Reichardt, Klaus [1 ,4 ]
机构
[1] Univ Sao Paulo, Luiz de Queiroz Coll Agr ESALQ, BR-13418900 Piracicaba, Brazil
[2] Univ Fed Lavras, Agr Engn Dept, BR-37200000 Lavras, Brazil
[3] State Univ Ctr West Unictr, Postgrad Program Agron, BR-85015300 Guarapuava, Brazil
[4] Univ Sao Paulo, Ctr Nucl Energy Agr CENA, BR-13400970 Piracicaba, Brazil
关键词
Glycine max; Soil matric potential; Proline; Water deficit tolerance; Crop responses; GLYCINE-MAX L; DROUGHT STRESS; PLANT; IRRIGATION; STRATEGIES; CULTIVARS; PRESSURE; PROLINE; MERR;
D O I
10.1007/s12892-022-00157-1
中图分类号
Q94 [植物学];
学科分类号
071001 ;
摘要
Water deficit during grain filling is a key factor on soybean (Glycine max (L.) Merrill) production, but plant response to different water stress levels should be better understood. This study evaluated soybean plant response to different soil water levels during grain filling. It was assessed the gravimetrical humidity and soil matric potential, leaf relative water content, leaf water potential, proline, and yield components of plants under a range of days without irrigation (0, 3, 6, 9, and 12) during grain filling phase. Until soil matric potential was around -0.8 atm soybean water deficit tolerance mechanisms were enough to maintain leaf relative water content and leaf water potential at acceptable levels, which proline concentration was a key factor in this mechanism. Leaf relative water content and leaf water potential showed to be related in maintaining soybean yield under water deficit and they may be used in studies of soybean tolerant cultivars to water restriction. From 9 days on, critical yield losses were observed due to water stress. The information presented in this study supports soybean producers in decision-making in irrigated systems to minimize productivity losses due to water deficit during the critical period of the crop-grain filling.
引用
收藏
页码:27 / 37
页数:11
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