摘要
采用溶液培养和放射性同位素技术 ,比较籽粒低锌含量基因型水稻 (OryzasativaL .)湘早籼 17与籽粒高锌含量基因型水稻V5 6根系形态及有关生理特性的差异 ,发现V5 6的根系比湘早籼 17大 (根较长 ,根体积较大 ,生物量较高 )、根冠比值较高及根系吸收锌的Km值较低 ,因而对锌的吸收量较大。这些特性可作为筛选籽粒高锌含量基因型水稻的指标。
Comparative studies on the difference of root morphological and physiological characteristics related with zinc absorption between two varieties of rice , one named “Xiangzhaoxian 17” which belongs to Zn\|poor grain genotype and the other named V56 which belongs to Zn\|rich grain genotype, were carried out by means of using solution culture and radioisotope techniques. Compared with “Xiangzhaoxian 17”, V56 has bigger root system (longer length, bigger volume and greater biomass), greater root\|top ratio, and lower \%K\%\-\{m\}value of zinc uptake by root, so that V56 absorbs zinc more efficiently. These characteristics may be used as indexes for screening Zn\|rich grain genotype rice.
出处
《植物资源与环境学报》
CAS
CSCD
2000年第3期26-29,共4页
Journal of Plant Resources and Environment
基金
湖南省教育委员会资助项目
湛江师范学院博士基金资助项目!( 9810 6)
关键词
水稻
高锌籽粒
根形态
根冠比
KM值
rice
Zn\|rich grain
root morphology
root\|top ratio
\%K\%\-\{m\}value
