Leaf Turgor Potential, Plant Growth and Photosynthesis in Organically Fertilized Sweet Corn
文献类型： 外文期刊
作者： Xu, HL 1 ; Wang, XJ 2 ; Wang, JH 2 ; Xu, RY 2 ; Zhao, AH 2 ;
作者机构： 1.Int Nat Farming Res Ctr, Nagano 3901401, Japan
2.Int Nat Farming Res Ctr, Nagano 3901401, Japan; Beijing Acad Agr & Forestry Sci, Beijing 100081, Peoples R China
关键词： leaf photosynthesis;osmotic potential;sweet corn (Zea mays L.);turgor potential;water potential
期刊名称：PEDOSPHERE （ 影响因子：3.911； 五年影响因子：4.814 ）
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收录情况： SCI
摘要： A greenhouse pot experiment was conducted using a complete random design with six replications. A pressure-volume curve analysis was employed to study the effects of organic fertilizers on plant water relations in sweet corn (Zea mays L. cv. Honey-bantam) in terms of leaf osmotic concentration (C_S), osmotic potentials at full turgid status (pi_(FT)) and at incipient plasmolysis (pi_(IP)), and of symplastic (zeta_(sym)) and apoplastic (zeta_(apo)) fractions in the tissue water compartment in relationto photosynthetic capacity (P_C) and dry mass accumulation. At the seedling stage (day 15), plants with chemical fertilizer treatments showed lower pi_(FT), pi_(IP) and zeta_(apo) and higher C_S, zeta_(sym) and P_C than those with organic fertilizer treatments Compared to P_C and relative growth, where values from day 15 to day 75 were first lower for organic treatments and then higher, zeta_(sym) and C_S values were similar, while pi_(FT) and pi_(IP) were opposite being higher then lower. Dry mass production with organic fertilizer was higher than or close to the chemical fertilizer treatments in the later growth stage (day 75), though dry mass production with chemical fertilizers was much higher in the early and middle growing stages (days 15 and 45). Increased photosynthesis and dry mass production in later growth stages due to organic fertilizers were associated with increased osmotic concentration in the tissue and the symplastic fraction of the tissue water compartment These might favor stomatal opening and biochemical activities.
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