来自细胞工程技术的不同低磷耐受性玉米自交系磷营养特性分析  

Phosphorus Nutrient Characteristics of Cellular Engineering Produced Maize Inbreds with Different Low-P Tolerances

作　　者：张可炜[1] 李坤朋[1] 刘存辉[2] 刘志刚[1] 王贤丽[1] 张举仁[1] 

机构地区：[1]山东大学生命科学学院 [2]山东省种子管理总站,济南250100

出　　处：《应用与环境生物学报》2008年第2期158-162,共5页Chinese Journal of Applied and Environmental Biology

基　　金：国家自然科学基金(No.30070487);“863”计划项目资助(2006AA10A107)~~

摘　　要：通过大田试验研究了5份不同低磷耐受性的玉米自交系在苗期、拔节期、籽粒成熟期的磷营养特征.结果表明:低磷条件下,磷吸收效率是玉米苗期和籽粒成熟期耐低磷特性差异的主要来源,而拔节期耐低磷特性则由磷吸收效率和利用效率共同决定.成熟期磷效率相关性分析表明,磷吸收效率与磷效率呈显著正相关,磷吸收效率是决定此时期磷效率的主要因素之一.在低磷条件下,来自细胞工程的4份玉米自交系与对照齐319相比,籽粒产量和磷响应度均存在较大差异,其中自交系SD-B和SD-C产量较高,分别为齐319的1·40倍和1·32倍.从籽粒产量和植株磷含量两方面来看,SD-B和SD-C可能为磷高效率高响应型.低磷胁迫下,SD-B、SD-C在不同生育期与其它3个自交系相比,均表现出磷吸收能力强的特点.In the field, P nutrient characteristics of maize inbred lines with different low-P tolerances were analyzed at seedling, jointing and maturity stages, respectively. The results showed that under low-P condition, P-uptake efficiency was the main contributor to P tolerance of the inbred lines at the seedling and maturity stages, while the P tolerance at jointing stage was determined by both uptake and use efficiencies. At the maturity stage, there was a significantly positive correlation between P-efficiency and P-uptake efficiency. Therefore, P-uptake efficiency was a main factor to P-efficiency at this stage. Under P deficiency, compared with Qi319 （CK）, the four inbred lines obtained by cell engineering showed significant variations in grain yields and responses to P. The yields of SD-B and SD-C lines were up to 1.40 and 1.32 times higher than that of Qi319, respectively. Based on the results of grain yield and P content of plant, the SD-B and SD-C were likely P-efficiency genotypes with high response to P, which showed higher P uptake ability at different stages under P deficiency, compared with other in- bred lines. Tab 4. Ref 26

关 键 词：玉米 耐低磷 吸收效率 利用效率 磷效率 

分 类 号：S513[农业科学—作物学]