Relations Between Photosynthetic Parameters and Seed Yields of Adzuki Bean Cultivars （ Vigna angularis）

• Published in: Journal of Integrative Agriculture Vol. 11; no. 9; pp. 1453 - 1461
• Main Authors: SONG, Hui, GAO, Jin-feng, GAO, Xiao-li, DAI, Hui-ping, ZHANG, Pan-an, WANG, Peng-ke, CHAI, Yan, FENG, Bai-li
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.09.2012; Elsevier
• Subjects: adzuki bean; chlorophyll content; dry seed yield; net photosynthetic rate; 光合参数; 光合能力; 净光合速率; 叶绿素含量; 品种; 小豆; 成熟叶片; 种子产量; dry seed yield; adzuki bean; net photosynthetic rate; chlorophyll content
• ISSN: 2095-3119; 2352-3425
• DOI: 10.1016/S2095-3119(12)60145-2

The study comparatively examined the leaf photosynthetic capacities of different adzuki bean cultivars, high-yield 2000-75 and Jihong 9218, and low-yield Hongbao 1 and Wanxuan 1 from flowering to ripening. It showed that after flowering, the leaves of the cultivars gradually aged, the leaf chlorophyll （Chl.）, soluble protein （SP） contents, net photosynthetic rates （Pn）, transpiration rates （Tr） and stomatal conductance （G） of the cultivars tended to decline, but the leaf intercellular CO2 concentration （Ci） of the cultivars tended to rise. The leaf photosynthetic capacities of the cultivars decreased gradually from the lower to the upper nodes. The dry seed yields of the cultivars were positively correlated with their leaf Chl., SP, Pn, and Tr and Gs, and negatively associated with their leaf Ci. At the late growth stages, the high-yield cultivars maintained higher leaf Chl. contents, SP contents, Pn, Tr, and Gs than the low-yield cultivars, indicating that leaf photosynthetic capacity was one of important yield-affecting factors of adzuki bean. Therefore, it was important for a crop at the crucial stage of yield formation to maintain a high leaf chlorophyll content and a high leaf photosynthetic capacity and delay leaf aging.