4种木瓜新品种光合作用日变化以及气孔导度-VPD响应  

Photosynthetic Diurnal Courses and Gs - VPD Responses of the Four New Carica papaya Linn. Genotypes

作　　者：刘世平[1] 邓雄[2] 蔡楚雄[1] 曹洪麟[2] 叶万辉[2] 

机构地区：[1]东莞植物园,广东东莞523079 [2]中国科学院华南植物研究所,广东广州510650

出　　处：《中山大学学报（自然科学版）》2003年第A19期215-218,共4页Acta Scientiarum Naturalium Universitatis Sunyatseni

基　　金：国家重点基础研究发展资助项目(G2000046803);广东省自然科学基金重点发展(021536);广东省科技厅国际合作资助项目(2002B50802);广东省科技厅工程资助项目(2KB068015)

摘　　要：研究了4个木瓜Carica papaya Linn新品种的光合作用日变化特性,表明在网室栽培下的4个木瓜品种光合日变化均为“单峰曲线”,而不使用遮荫措施的两个木瓜品种均为“双峰曲线”,气孔导度与蒸汽压差的响应拟合表明,在遮荫条件下,其气孔导度-VPD的负相关趋势不显著,而在不遮荫栽培条件下则呈显著负相关(P≤0.05)。表明遮荫使木瓜避开了午间的高光强、高温以及高湿度的抑制。The photosynthetic diurnal courses of four new Carica papaya Linn, genotypes were studied, the results showed that in the network, the four C.papaya genotypes all have "one-peaked curves", but have "two-peaked curves" in the unshaded field. Stomatal conductance (gs) and vapor pressure deficit (VPD) are not significantly correlated in network conditions, but have negative correlation significantly (P ≤0.05) in the unshaded field. It is supposed that network be helpful for the Carica papaya escaping from the stress caused by the high temperature, strong light and high humidity.

关 键 词：木瓜Carica PAPAYA LINN 光合日变化 气孔导度 蒸汽压差 

分 类 号：Q945.1[生物学—植物学]