水稻远缘杂交后代的耐强光和抗光氧化特性

作物学报 ›› 2006, Vol. 32 ›› Issue (12): 1913-1916.

水稻远缘杂交后代的耐强光和抗光氧化特性

李涛^1,2;丁在松¹;关东明³;陈传永²;孙锐²;赵明^1,*

1中国农业科学院作物科学研究所, 北京100081; 2中国农业大学农学与生物技术学院, 北京100094; 3中国矿业大学化学与环境工程学院, 北京100083

收稿日期:2005-10-25 修回日期:1900-01-01 出版日期:2006-12-12 网络出版日期:2006-12-12
通讯作者: 赵明

Characteristics of Photosynthesis and Photo-oxidation in the Hybrid between Oryza sativa and Oryza rufipogon

LI Tao¹²,DING Zai-Song¹,GUAN Dong-Ming³,CHEN Chuan-Yong²,SUN Rui²,ZHAO Ming^1*

1 Institute of Crop Science, Chinese Academy of Agricultural Sciences, Beijing 100081; 2Agronomy and Biotechnology College, China Agricultural University, Beijing, 100094; 3 Chemical and Environment-Engineering College, China University of Mining and Technology, Beijing 100083, China

Received:2005-10-25 Revised:1900-01-01 Published:2006-12-12 Published online:2006-12-12
Contact: ZHAO Ming

摘要/Abstract

摘要： 为探明通过远缘杂交（Oryza sativa Azucena × Oryza rufipogon Ramper 6）手段获得的水稻高光合后代株系（SHPF₆）在生长关键时期的耐强光和抗光氧化能力，本文以生育期一致的推广品种中花10号为对照，进行了光合作用测定和抗光氧化特性的研究。结果表明，强光下SHPF₆表现较高的净光合速率P_n），并随着光强进一步增强而有较大的上升，这种高光合优势突出表现于P_n与胞间CO₂浓度（C_i）的极显著负相关（r =－0.767, P<0.01），及气孔导度（G_s）、蒸腾速率（T_r）无论光强大小均高于对照；光氧化条件下，中花10号F₀显著升高（P<0.05），F_v/F_m和F_v/F₀均显著降低（P<0.05），而SHPF₆各荧光参数在统计上没有较大差异，说明SHPF₆具有较强的抗光氧化能力。这些结果意味着，通过远缘杂交手段，不仅可以提高普通栽培品种的光合速率和CO₂羧化能力，还能改善水稻的抗光氧化能力。

关键词: 远缘杂交, 野生稻, 光合作用, 光氧化

Abstract:

During the grain-filling period, photosynthesis in rice plants contributes 60%–100% of the final grain carbohydrate, but in the mean time, photo-oxidation caused by low temperature and high light is always suffered by top leaves. So it is same importance to increase the resisting photo-oxidation, as well as to improve net photosynthetic rate (P_n) in this period. In previous works, the progenies (SHPF₆) which had high net photosynthetic rate were obtained from the hybrids Oryza sativa Azucena × Oryza rufipogon Ramper 6. Photosynthetic structures of them have been transformed so that a high G_s can be seen. But it is not known whether these progenies also have a high net photosynthetic rate in the grain-filling period and whether they can resist the photo-oxidation under the high light circumstance after the MV treatment. Thus, in this paper, a MV treatment was applied, photosynthetic parameters and chlorophyll fluorescence were measured to identify the extent of photo-oxidation. The results showed that SHPF₆ had a high P_n under high light in the filling-grain period and the Pn increased with the further increment of light intensity. There was a significant correlation with between and P_nC_i(r = －0.767, P<0.01). After MV treatment, the value of F₀, F_v/F_m and F_v/F₀ changed significantly in Zhonghua 10 (P < 0.05), but not in SHPF₆. All of this results suggested that the method of distant crossing can not only improve the net photosynthetic rate, increase stomatal conductance and promote the efficiency of CO₂ assimilation in the filling-grain period, but also increase the resistance to photo-oxidation.

Key words: Wild cross, Wild rice, Photosynthesis, Photo-oxidation

中图分类号:

S511

李涛;丁在松;关东明;陈传永;孙锐;赵明. 水稻远缘杂交后代的耐强光和抗光氧化特性[J]. 作物学报, 2006, 32(12): 1913-1916.

LI Tao;DING Zai-Song;GUAN Dong-Ming;CHEN Chuan-Yong;SUN Rui;ZHAO Ming. Characteristics of Photosynthesis and Photo-oxidation in the Hybrid between Oryza sativa and Oryza rufipogon[J]. Acta Agron Sin, 2006, 32(12): 1913-1916.

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链接本文: https://zwxb.chinacrops.org/CN/

https://zwxb.chinacrops.org/CN/Y2006/V32/I12/1913

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