It was important for callus induction and shoot differentiation to choose better starting materials and a suitable medium in rice anther culture.
选择合适的水稻花培起始材料，选用适宜的培养基配方，对于水稻花培中愈伤组织诱导和分化至关重要。
In rice (Oryza sativa), the shoot-borne crown roots are the major root type and are initiated at lower stem nodes as part of normal plant development.
水稻地上部形成的冠状根主要是在低位茎节上长出的根，是植物正常发育一部分。
With the improvement of rice cultivars, root dry weight and the ratio of root to shoot were increased, but the amount of root bleeding sap was reduced.
随品种的演进，抽穗期根重以及根冠比提高，但根系伤流液量减少。
Results showed that there were significantly genotypic variations in rice grain yield, K utilization efficiency and shoot K accumulation at different growth stage under two different K supply.
研究结果表明，两种供钾水平下，水稻的稻谷产量、钾利用效率和各生育期地上部钾积累都存在显著的基因型差异。
Root to shoot ratio of upland rice (0.116) was remarkably bigger than that of paddy rice (0 087). Root respiration rate of the former was 2.7 times of the latter.
覆草旱作的根冠比(0.116)显著大于常规水稻(0.087)，前者的根系呼吸强度是常规水稻的2.7倍。
The results suggest that the improved root and shoot growth increases grain yield of the modern cultivars, especially super rice cultivars.
说明改善的根系和地上部的生长，促进了现代品种特别是超级稻品种产量的提高。
The results suggest that the improved root and shoot growth increases grain yield of the modern cultivars, especially super rice cultivars.
说明改善的根系和地上部的生长，促进了现代品种特别是超级稻品种产量的提高。
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