Morphological and Anatomical Characteristics of 'MC Type' Rice (Oryza sativa L.) Seedlings of cv. Basmati 217

Japanese Journal of Crop Science

Hajime WATANABE¹  Kiyoshi TAKAHASHI¹ 

关键词: Coleoptilar node root;    イネ;    Coleoptile;    鞘葉;    Deep seeding;    鞘葉節冠根;    Mesocotyl;    中茎;    Rice;    深播き;    Seedling;    幼植物;   

DOI  :  10.1626/jcs.64.581

学科分类：农业科学（综合）

来源: Nihon Sakumotsu Gakkai / Crop Science Society of Japan

【 摘 要 】

To clarify the morphological features and internal structure of shoot apex of MC seedlings, one of the rice seedlings type, in relation to agricultural significance, an Indian rice cultivar, Basmati 217, was used. Sterilized brown rice grains were cultured on 0.8% agar medium and maintained at 30°C in the dark for 14 days. The lengths of mesocotyl, coleoptile, first leaf and second leaf were examined. The M/C ratio (mesocotyl length/coleoptile length) was also calculated. Based on the existence of coleoptilar node root, 2 types of frequency distribution of the coleoptile final length and MC ratio were observed. One type belonged to the MCN (MC seedlings with no nodal root), and the other one to the MCR (MC seedlings with nodal root). The mean length of coleoptile and mean M/C ratio of MCN were 8.3±0.5mm and 16.6±0.9 whereas those of MCR were 35.2±1.4mm and 2.8±0.3 respectively. The correlation coefficient for mesocotyl length versus coleoptile lengh of the MCR was significantly negative (r=-0.537**) whereas that of the MCN was positive and not significant (r=+0.032). It was observed that the number of leaf primordia of MCR was 0.6 higher than that of MCN. The shoot apex of MCR was more developed than that of MCN. From these results, we identified three types of rice seedlings based on the emergence of the first leaf, coleoptile length and the existence of coleoptilar node root as follows : MCN, MCR and non-MC seedling.

【 授权许可】

Unknown