中国农学通报
中國農學通報
중국농학통보
CHINESE AGRICULTURAL SCIENCE BULLETIN
2013年
24期
28-35
,共8页
陶佩琳%刘寒寒%邓红%张可炜
陶珮琳%劉寒寒%鄧紅%張可煒
도패림%류한한%산홍%장가위
玉米%根系分泌物%难溶性磷
玉米%根繫分泌物%難溶性燐
옥미%근계분비물%난용성린
maize (Zea mays L.)%root exudates%sparingly soluble phosphate
为了解低磷胁迫下不同基因型玉米对难溶性磷酸盐的吸收利用的差异，以不同磷效率玉米自交系SDKH502和SDLH502为材料，采用营养液培养和砂培的方法，研究不同磷处理对玉米幼苗的生长以及对难溶性磷酸钙、磷酸铁、磷酸铝吸收利用能力的影响。结果表明：正常供磷处理和低磷处理的玉米植株的根系分泌物对难溶性磷酸盐都具有一定的活化能力，低磷胁迫下玉米的根系分泌物对 Al-P、Ca-P或Fe-P的活化能力高于正常供磷处理的植株。与足磷下相比，低磷下SDKH502的根系分泌物对Al-P、Ca-P、Fe-P 的活化能力依次提高了69.28%、87.34%和51.83%，SDLH502则依次提高了165.67%、141.13%和6.35%。与足磷下相比，低磷下 SDKH502和 SDLH502的根系分泌的有机酸分别提高了26.96%和18.85%，pH分别降低了0.79、0.57个单位，SDKH502和SDLH502间存在显著差异。在低磷胁迫下，自交系 SDKH502和 SDLH502活化吸收难溶性磷酸盐能力的不同与 SDKH502和 SDLH502根系分泌有机酸和质子能力的差异有关。
為瞭解低燐脅迫下不同基因型玉米對難溶性燐痠鹽的吸收利用的差異，以不同燐效率玉米自交繫SDKH502和SDLH502為材料，採用營養液培養和砂培的方法，研究不同燐處理對玉米幼苗的生長以及對難溶性燐痠鈣、燐痠鐵、燐痠鋁吸收利用能力的影響。結果錶明：正常供燐處理和低燐處理的玉米植株的根繫分泌物對難溶性燐痠鹽都具有一定的活化能力，低燐脅迫下玉米的根繫分泌物對 Al-P、Ca-P或Fe-P的活化能力高于正常供燐處理的植株。與足燐下相比，低燐下SDKH502的根繫分泌物對Al-P、Ca-P、Fe-P 的活化能力依次提高瞭69.28%、87.34%和51.83%，SDLH502則依次提高瞭165.67%、141.13%和6.35%。與足燐下相比，低燐下 SDKH502和 SDLH502的根繫分泌的有機痠分彆提高瞭26.96%和18.85%，pH分彆降低瞭0.79、0.57箇單位，SDKH502和SDLH502間存在顯著差異。在低燐脅迫下，自交繫 SDKH502和 SDLH502活化吸收難溶性燐痠鹽能力的不同與 SDKH502和 SDLH502根繫分泌有機痠和質子能力的差異有關。
위료해저린협박하불동기인형옥미대난용성린산염적흡수이용적차이，이불동린효솔옥미자교계SDKH502화SDLH502위재료，채용영양액배양화사배적방법，연구불동린처리대옥미유묘적생장이급대난용성린산개、린산철、린산려흡수이용능력적영향。결과표명：정상공린처리화저린처리적옥미식주적근계분비물대난용성린산염도구유일정적활화능력，저린협박하옥미적근계분비물대 Al-P、Ca-P혹Fe-P적활화능력고우정상공린처리적식주。여족린하상비，저린하SDKH502적근계분비물대Al-P、Ca-P、Fe-P 적활화능력의차제고료69.28%、87.34%화51.83%，SDLH502칙의차제고료165.67%、141.13%화6.35%。여족린하상비，저린하 SDKH502화 SDLH502적근계분비적유궤산분별제고료26.96%화18.85%，pH분별강저료0.79、0.57개단위，SDKH502화SDLH502간존재현저차이。재저린협박하，자교계 SDKH502화 SDLH502활화흡수난용성린산염능력적불동여 SDKH502화 SDLH502근계분비유궤산화질자능력적차이유관。
In order to investigate the genotypic variation of maize in uptake and utilization of sparingly soluble phosphate under Low-P stress, two inbred lines SDKH502 and SDLH502 of maize with different phosphorous use efficiency are used as materials. Sand pot and hydroponics experiments are carried out to study the effect of differences phosphorous supplying on growth of seedling, and the ability of mobilization and utilization for sparingly soluble phosphate (Al-P, Ca-P or Fe-P) of maize. The experimental results demonstrated that the root exudates could mobilize the sparingly soluble phosphates in the condition of normal phosphate supply and phosphate starvation, and phosphate starvation caused the improvement in mobilization of sparingly soluble phosphate (Al-P, Ca-P or Fe-P). Compared with normal phosphate supply condition, the ability of activating the sparingly soluble Al-P, Ca-P, Fe-P by root exudates of SDKH502 increased by 69.28% , 87.34% and 51.83%, while the SDLH502 enhanced by 165.67%, 141.13, and 6.35% under phosphate deficient condition. Beside that, the organic acids secretion from roots of SDKH502 and SDLH502 increased by 26.96% and 18.85%, pH value depressed by 0.79 and 0.57 units separately. There were remarkable differences between SDKH502 and SDLH502 in responding to phosphate starvation. Those results above showed that, the difference of the secretion of organic acids and proton might result in various mobilization and absorption ability of sparingly soluble phosphate between SDKH502 and SDLH502.
