Photosynthetic and Root Bleeding Characteristics of Mung Bean Varieties and Their Relationship with Yield

doi:10.11924/j.issn.1000-6850.casb2024-0447

Abstract

Abstract:

The paper aims to clarify the characteristics of leaf photosynthesis and root injury flow characteristics of different mung bean varieties after pod formation and their relationship with yield. This experiment used five mung bean varieties mainly planted in Jilin Province, namely ‘Jilv 8’, ‘Jilv 9’, ‘Jilv 12’, ‘Jilv 17’ and ‘Jilv 20’, as materials. The leaf photosynthesis-related parameters and root damage characteristics were measured at the pod-setting stage (R4 stage), a critical period for mung bean yield formation, and the yield was measured at the maturity stage. The results showed that there were differences in leaf photosynthesis, root injury characteristics, and yield among different mung bean varieties. The net photosynthetic rate, stomatal conductance, intercellular carbon dioxide concentration, transpiration rate, root exudate intensity, soluble protein content and intensity, soluble sugar content and intensity, free amino acid content and intensity, and yield of leaves of ‘Jilv 12’ and ‘Jilv 9’ were relatively high, significantly higher than those of ‘Jilv 8’, ‘Jilv 17’and ‘Jilv 20’. The differences in various indicators between the mung bean varieties ‘Jilv 12’ and ‘Jilv 9’ were relatively small. The yield of mung beans was positively correlated with the photosynthetic capacity of leaves and the components and content in root sap. This experiment shows that the yield of different mung bean varieties is closely related to leaf photosynthesis and bleeding characteristics.

Key words: mung bean, photosynthesis, bleeding fluid, yield, net photosynthetic rate, bleeding intensity, root system

QI Zexin, GUAN Chenglong, ZHANG Mengru, WANG Ye, SUN Wenzheng, ZHANG Zhian, BAO Shuying. Photosynthetic and Root Bleeding Characteristics of Mung Bean Varieties and Their Relationship with Yield[J]. Chinese Agricultural Science Bulletin, 2025, 41(10): 18-24.

Figures/Tables 13

References 30

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