| Photosynthetic Responses of A New Grapevine Variety ‘Xinyu’ in Turpan |
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| 作者姓名： | JI Wei SUN Feng LUO Qiang-wei ZHANG Zong-qin |
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| 作者单位： | （1. Key Laboratory of Biology and Genetic Improvement of Horticultural Crops(Northwest Region), Ministry of Agriculture, P.R.China，State Key Laboratory of Crop Stress Biology in Arid Areas, Northwest A＆F University, Yangling, Shaanxi 712100 China; 2.Institute of Grape and Melon of Xinjiang Uygur Autonomous Region, Shanshan, Xinjiang 838200, China） |
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| 摘 要： | Turpan is one of the major high-quality grape production bases in the world for years because its climate is so special (hot, dry, and windy). The grape market needs the varieties with high yield, quality, and environmental adaptability. ‘Xinyu’ is a new variety bred by crossing selection of E42-6 (a self-pollinated inbred of Vitis vinifera cv. ‘Red Globe’) as female and Vitis vinifera cv. ‘Rizamat’ as male parents and registered in the Crop Varieties Registered Commission of Xinjiang Uygur Autonomous Region in 2005. In this study, we determined the impacts of environmental factors on its photosynthesis. The results showed the climate in Turpan was characterized by long-time intensive sunshine, high temperature and relatively low humidity. The peak value of photosynthetic available radiation (PARi) was 1 454 μmol·m-2·s-1, and the minimum and average values were 111 μmol·m-2·s-1and 938.889 6 μmol·m-2·s-1, respectively. Air temperature and sunlight intensity reached the highest values during 1 p.m. to 4 p.m. Net photosynthetic rate (Pn) of Xinyu increased stably before 11 a.m. and there was a midday depression during 11 a.m. to 2 p.m. The minimum value of Pn appeared at noon (2.77 μmol·m-2·s-1). It was concluded that as a new grape cultivar, “Xinyu” could withstand extreme climate conditions in Turpan.
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| 关 键 词： | vitisvitis grapevine photosynthesis new variety Turpan |
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