期刊
PHOTOSYNTHETICA
卷 56, 期 4, 页码 1387-1397出版社
ACAD SCIENCES CZECH REPUBLIC, INST EXPERIMENTAL BOTANY
DOI: 10.1007/s11099-018-0834-4
关键词
harvest index; number of pods; water deficit
资金
- Faculty of Agriculture, University of Tabriz, Tabriz, Iran
Three prevalent aliphatic polyamines (PAs) include putrescine, spermidine, and spermine; they are low-molecular-mass polycations involved in many physiological processes in plants, especially, under stressful conditions. In this experiment, three bean (Phaseolus vulgaris L.) genotypes were subjected to well-watered conditions and two moderate and severe water-stressed conditions with and without spermidine foliar application. Water stress reduced leaf relative water content (RWC), chlorophyll contents, stomatal conductance (gs), intercellular CO2 concentration (C (i)), transpiration rate, maximal quantum yield of PSII (F-v/F-m), net photosynthetic rate (P (N)), and finally grain yield of bean plants. However, spermidine application elevated RWC, gs, C (i), F-v/F-m, and P (N), which caused an increase in the grain yield and harvest index of bean plants under water stress. Overall, exogenous spermidine could be utilized to alleviate water stress through protection of photosynthetic pigments, increase of proline and carotenoid contents, and reduction of malondialdehyde content.
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