Volume 14, Issue 68 (vol. 14, no. 68 2025)
2025, 14(68): 115-132 |
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Asadi A A, Shobeiri S S. Evaluation of photosynthetic parameters and their relationships with grain yield in Chitti bean lines (Phaseolus vulgaris) in deficit and normal irrigation. Plant Process and Function 2025; 14 (68) : 8
URL: http://jispp.iut.ac.ir/article-1-2136-en.html
URL: http://jispp.iut.ac.ir/article-1-2136-en.html
1- Assistant Professor of Crop and Horticultural Science Research Department, Zanjan Agriculture and Natural Resources Research and Education Center (AREOO), Zanjan, Iran
2- Assistant Professor of Crop and Horticultural Science Research Department, Zanjan Agriculture and Natural Resources Research and Education Center (AREOO), Zanjan, Iran ,s.shobeiri@yahoo.com
2- Assistant Professor of Crop and Horticultural Science Research Department, Zanjan Agriculture and Natural Resources Research and Education Center (AREOO), Zanjan, Iran ,
Abstract: (115 Views)
Increasing awareness of the physiological traits effective in the formation of seed yield in different irrigation conditions can be a suitable criterion for selecting these traits to improve seed yield in these conditions. In order to investigate the changes of these parameters and their relationship with the yield in chiti beans, an experiment was conducted in the form of a randomized complete block design with three replications in 5 and 9 day irrigation cycles at the Khairabad Zanjan research station in the crop year 2023-2024. Between the two irrigation conditions, a significant difference was observed in the characteristics of leaf temperature, transpiration, photosynthetic water use efficiency, water use efficiency, and yield. The studied genotypes showed significant differences in leaf temperature, substomatal CO₂, photosynthetic water consumption efficiency, and yield, which indicates the existence of genetic diversity between genotypes in terms of these traits. Genotypes G1, G2, G4, G9, and G12 showed higher photosynthesis rates, stomatal conductance, water use efficiency, and mesophilic conductance than other genotypes. Genotypes G10, G15 and G8 had the highest yield compared to other genotypes. The highest efficiency of photosynthetic water consumption was related to G16 and G14 genotypes, and the lowest was related to G2 and G10 genotypes. The highest rate of photosynthesis was related to G4 and G13 genotypes, and the lowest rate was related to G11 and G14 genotypes. No significant correlation was observed between yield and any of the investigated physiological traits in both irrigation conditions. The rate of photosynthesis had a significant positive relationship with mesophilic conductance and water use efficiency in both irrigation conditions. Photosynthesis rate had a significant positive correlation with the transpiration and stomatal conductance in the irrigation cycle of 9 days, and in the irrigation of the 5-day cycle, there was a positive and non-significant correlation. In both irrigation conditions, sub-stomatal CO2 and leaf temperature with a negative coefficient and transpiration with a positive coefficient justified the changes in photosynthesis. In irrigation of a 9-day cycle, stomatal conductance with a negative coefficient is also involved in justifying the changes in photosynthesis. Due to the existence of variation in some photosynthetic indices in genotypes, this test can be performed in different stress conditions and used to select efficient genotypes in stress conditions.
Article number: 8
Type of Study: Research |
Subject:
Droughts Stress
Received: 2024/11/4 | Accepted: 2025/03/4 | Published: 2025/10/29
Received: 2024/11/4 | Accepted: 2025/03/4 | Published: 2025/10/29
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