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Changes in Leaf Length, Width, Area, and Photosynthesis of Fruit Cucumber in a Greenhouse Production System

文献类型： 外文期刊

作者： Ding, Xiaotao 1 ; Yu, Liyao 1 ; Jiang, Yuping 3 ; Yang, Shaojun 2 ; He, Lizhong 2 ; Zhou, Qiang 2 ; Yu, Jizhu 2 ; Huang, 1 ;

作者机构： 1.Shanghai Jiao Tong Univ, Sch Agr & Biol, Shanghai 202400, Peoples R China

2.Shanghai Acad Agr Sci, Shanghai Key Lab Protected Hort Technol, Shanghai 201106, Peoples R China

3.Shanghai Inst Technol, Fac Ecol Technol & Engn, Shanghai 201418, Peoples R China

关键词： cucumber; leaf morphology; leaf position; model building; photo-synthetic variable

期刊名称：HORTSCIENCE （ 影响因子：1.455； 五年影响因子：1.617 ）

ISSN： 0018-5345

年卷期： 2020 年 55 卷 7 期

页码：

收录情况： SCI

摘要： Changes in leaf length, width, area, weight, chlorophyll and carotenoids contents, and photosynthetic variables with different leaf positions were investigated in fruit cucumber. Plants were grown on rockwool slabs in an environmentally controlled greenhouse and irrigated by drip fertigation. Leaf measurements were conducted from the first to the 15th leaf (the oldest to the youngest). The results showed that fresh weight per unit leaf area decreased from the second to the 15th leaf. Changes in cucumber leaf length, width, and area followed quadratic models from the first to the 15th leaf. The quadratic models of leaf length, width, and area fit the measurements well, with R-2 values of 0.925, 0.951, and 0.955, respectively. The leaf chlorophyll a and b and carotenoid contents increased from the oldest leaf (first leaf) to the youngest leaf and decreased after reaching the highest values. Changes in the net photosynthetic rate (P-n) also followed the quadratic model from the first to the 15th leaf, with R-2 values of 0.975. The leaf transpiration rate (T-r) increased from the first to the 14th leaf. Our results revealed patterns in leaf growth and photosynthetic changes at different leaf positions in fruit cucumber and improved our understanding of the growth and development of fruit cucumber in the greenhouse production system.

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