CAJ | 학술논문

籽粒蛋白质含量不同的水稻品种产量对水分的响应缺乏研究。以日本晴及以其为亲本获得的两个籽粒蛋白质含量有明显差异的转基因水稻株系为材料，研究了结实期干湿交替灌溉对上述水稻产量和生理特性的影响。结果表明，在结实期相同水分处理条件下，水稻结实率和产量随籽粒蛋白质含量增加而降低。与常规灌溉相比，结实期轻干湿交替灌溉明显提高了水稻结实率和产量。籽粒中 Q 酶活性、根系氧化力、剑叶膜脂过氧化物酶的活性以及茎鞘中非结构性碳水化合物(NSC)的表观输出量也明显提高。籽粒蛋白质含量高的材料的产量和上述生理指标的提高幅度均高于籽粒蛋白质含量低的水稻材料。结实期重干湿交替灌溉则明显降低了水稻的结实率和产量，籽粒中 Q 酶活性、根系氧化力、剑叶膜脂过氧化物酶的活性以及茎鞘中非结构性碳水化合物(NSC)的表观输出量也明显降低，且籽粒蛋白质含量高的材料的产量和上述生理指标的降幅均高于籽粒蛋白质含量低的水稻材料。这些生理指标的变化可能是结实期干湿交替灌溉引起籽粒蛋白质含量不同的水稻材料产量产生差异的重要生理原因。
자립단백질함량불동적수도품충산량대수분적향응결핍연구。이일본청급이기위친본획득적량개자립단백질함량유명현차이적전기인수도주계위재료，연구료결실기간습교체관개대상술수도산량화생리특성적영향。결과표명，재결실기상동수분처리조건하，수도결실솔화산량수자립단백질함량증가이강저。여상규관개상비，결실기경간습교체관개명현제고료수도결실솔화산량。자립중 Q 매활성、근계양화력、검협막지과양화물매적활성이급경초중비결구성탄수화합물(NSC)적표관수출량야명현제고。자립단백질함량고적재료적산량화상술생리지표적제고폭도균고우자립단백질함량저적수도재료。결실기중간습교체관개칙명현강저료수도적결실솔화산량，자립중 Q 매활성、근계양화력、검협막지과양화물매적활성이급경초중비결구성탄수화합물(NSC)적표관수출량야명현강저，차자립단백질함량고적재료적산량화상술생리지표적강폭균고우자립단백질함량저적수도재료。저사생리지표적변화가능시결실기간습교체관개인기자립단백질함량불동적수도재료산양산생차이적중요생리원인。
Little is known on the yield response to water management for those rice cultivars with different protein content in grains (PCG).Effect of alternate wetting and soil drying irrigation during grain filling on grain yield and its physiological traits were investigated with Nipponbare and its two transgenic strains differing in PCG as materials.The results showed that the filled grain rate and grain yield were decreased with increasing PCG under the same water treatment.Alternate wetting and moderate soil drying irrigation (WMD)during grain filling significantly increased grain yield.Q-enzyme activity in rice grains,root oxidation activity,membrane lipid peroxidation enzyme activities in the flag leaves and the translocation of non-structural carbohydrate (NSC)in rice stem were also significantly increased under WMD.And the increasing extent of grain yield and the above physiological traits was higher in the rice lines with higher PCG than those with lower PCG.Alternate wetting and severe soil drying irrigation (WSD)during grain filling significantly decreased filled grain rate and yield,Q-enzyme activity in rice grains,root oxidation activity,membrane lipid peroxidation enzyme activities in the flag leaves and the translocation of non-structural carbohydrate (NSC)in rice stem,when compared with conventional irrigation.And the decreasing extent of grain yield and the above physiological traits was higher in the rice lines with higher PCG than those with lower PCG.The changes of these physiological traits were probably the main reasons for the yield variation of rice lines with different PCG.