作物学报Issue(1)：89-99,11.DOI:10.3724/SP.J.1006.2015.00089
甬优系列籼粳杂交稻根系形态与生理特征
Root System Morphological and Physiological Characteristics ofIndica- japonica Hybrid Rice of Yongyou Series
摘要
Abstract
A field experiment was conducted to compare the root system morphological and physiological characteristics of four types of rice populations includingindica-japonica hybrid rice of Yongyou series (A),japonica hybrid rice (B), conventional japonica rice (C), andindica hybrid rice (D) under high-yielding cultivation condition in the rice-wheat cropping system. Results were as follows: (1) The root dry weight, aboveground dry weight, number of root tips, root length, root surface area, root-shoot ratio and root volume of A were obviously higher than those of B, C, and D at the middle and late growth stage. (2) The proportion of number, length, surface area and volume of the adventitious roots(root diameter > 0.3 mm) to the whole roots of A were higher than those of B and C, while lower than those of D at heading; the proportion of number, length, surface area and volume of the fine branches (root diameter≤ 0.1 mm) and coarse branches (0.1 mm < root diameter≤ 0.3 mm) to total roots of A were higher than those of D, while lower than those of B and C at heading. The proportions of root weight in 0–5 cm, 5–10 cm, and 10–15 cm soil layers to total roots weight of A were higher than those of B and C, while lower than those of D; however, the proportions of root weight in 15–25 cm, 25–35 cm, 35–45 cm, and 45–55 cm soil layers to the total root weight where lower than those of B and C, while higher than these of D at heading. (3) The total absorbing surface area, active absorbing surface area, bleeding intensity, root oxidation activity, and root reducing activity of A were higher than those of B, C, and D. Compared with B, C, and D, theindica-japonica hybrid rice of Yongyou series had significant advantage in root-shoot coordination level, root amount, branch structure, root distribution in soil and biological activity in the middle and late growth stage. This peculiarity of A provides an important guarantee to realize the super-high-yield.关键词
籼粳杂交稻/甬优系列/根系形态生理Key words
Indica-japonica hybrid rice/Yongyou series/Morphology and physiology of roots引用本文复制引用
姜元华,魏海燕,郭保卫,许俊伟,赵可,韦还和,孙建军,张洪程,戴其根,霍中洋,许轲..甬优系列籼粳杂交稻根系形态与生理特征[J].作物学报,2015,(1):89-99,11.基金项目
本研究由国家粮食丰产科技工程(2011BAD16B03),国家公益性行业(农业)科研专项(201303102),农业部超级稻专项(02318802013231)和江苏省研究生科研创新计划项目资助。 （2011BAD16B03）
