Characteristics of Leaf Photosynthesis in Chinese F1 Hybrid Rice Cultivar, Shanyou 63

Japanese Journal of Crop Science

Kenji HIRAO¹  Fumitake KUBOTA¹  Waichi AGATA¹  Xiang Fu SONG¹ 

关键词: Chlorophyll content;    RuBPCase活性;    Efficiency in nitrogen use for photosynthesis;    F1雑種水稲;    F1 hybrid rice;    可溶性タンパク質含量;    Leaf photo-synthetic rate;    クロロフィル含量;    RuBPCase activity;    光合成窒素利用効率;    Soluble protein content;    個葉光合成速度;   

DOI  :  10.1626/jcs.64.209

学科分类：农业科学（综合）

来源: Nihon Sakumotsu Gakkai / Crop Science Society of Japan

【 摘 要 】

Leaf photosynthetic rate (Pl) of Shanyou 63 (SLI), a Chinese F1 hybrid cultivar with exceedingly high yield, was evaluated in comparison with those of two Japanese leading pure-line cultivars (JC), Nipponbare and Koshihikari. The three cultivars were grown in pots from early to pre-heading stage. Stomatal and mesophyll conductances, chlorophyll content, soluble protein content and ribulose 1, 5-bisphosphate carboxylase (RuBP-Case) activity were measured. The results obtained are as follows : 1) Pl of SH was constantly higher than those of JC through the growth stage. Particularly at the early growth stage, the difference in Pl between SH and JC was Large: SH and JC showed 26.98 and 21.15 μmolm-2s-1, respectively. 2) The high Pl of SH at the earlly growth stage depended on both high stomatal and mesophyll conductances, while at the pre-heading stage the high mesophyll conductance was the main cause of increasing Pl. 3) Contents of chlorophyll and soluble protein of SH were significantly lower than those of JC, and there was no significant difference in RuBPCase activity between cultivars. 4) Thus SH, having low contents of chlorophyll and soluble protein in leaf, had a high Pl and maintained an almost similar level to those of JC in RuBPCase activity. A higher efficiency in nitrogen use for photosynthesis is one of the features observed in this cultivar.

【 授权许可】

Unknown