Blue-Light-Dependent Stomatal Density and Specific Leaf Weight Coordinate to Promote Gas Exchange of Soybean Leaves

Jiyu Chen, Jing Gao, Qi Wang, Xianming Tan, Shenglan Li, Ping Chen, Taiwen Yong, Xiaochun Wang, Yushan Wu, Feng Yang () and Wenyu Yang
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Jiyu Chen: College of Agronomy, Sichuan Agricultural University, Chengdu 611130, China
Jing Gao: College of Agronomy, Sichuan Agricultural University, Chengdu 611130, China
Qi Wang: College of Agronomy, Sichuan Agricultural University, Chengdu 611130, China
Xianming Tan: College of Agronomy, Sichuan Agricultural University, Chengdu 611130, China
Shenglan Li: College of Agronomy, Sichuan Agricultural University, Chengdu 611130, China
Ping Chen: College of Agronomy, Sichuan Agricultural University, Chengdu 611130, China
Taiwen Yong: College of Agronomy, Sichuan Agricultural University, Chengdu 611130, China
Xiaochun Wang: College of Agronomy, Sichuan Agricultural University, Chengdu 611130, China
Yushan Wu: College of Agronomy, Sichuan Agricultural University, Chengdu 611130, China
Feng Yang: College of Agronomy, Sichuan Agricultural University, Chengdu 611130, China
Wenyu Yang: College of Agronomy, Sichuan Agricultural University, Chengdu 611130, China

Agriculture, 2022, vol. 13, issue 1, 1-13

Abstract: Blue and red light are essential light signals used to regulate stomatal development and leaf structure. In the present study, stomatal and leaf traits that respond to blue and red light were studied at two light intensities (400 and 100 µmol m −2 s −1 ) in soybeans. The stomatal traits and leaf characteristics were determined. Furthermore, their contribution to the operational maximum stomatal conductance ( g opmax ) was evaluated using the rdacca.hp R package. With the light intensity significantly reduced, the stomatal size (SZ) under blue light did not change. Similarly, the decrease in light intensity did not influence the stomatal density (SD), specific leaf weight (SLW) or g opmax under red light. These results implied that the regulation of SD and SLW depended on blue light and that SZ was highly sensitive to red light. In addition, SLW was strongly correlated with SD. The SLW and SD had the highest contribution rates (19.43% and 19.5%, respectively) to g opmax, as compared with the other parameters. In conclusion, these results suggested that in long-term exposure to blue light, the enhancements in g opmax were primarily due to the synergistic promotion of SLW and SD.

Keywords: specific leaf weight; stomatal conductance; stomatal density; stomatal size (search for similar items in EconPapers)
JEL-codes: Q1 Q10 Q11 Q12 Q13 Q14 Q15 Q16 Q17 Q18 (search for similar items in EconPapers)
Date: 2022
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