摘要
为研究耐热水稻品种Nagina 22(N22)开花结实期高温胁迫下的主要生理响应,采用温室盆栽试验,在各供试材料的开花期,利用人工气候室进行高温胁迫处理。研究结果表明:N22在高温胁迫下不改变开花期但表现出日开花量的转峰;与N22相比,水稻感热品种Moroberekan花药开裂显著受阻,柱头上萌发的花粉数显著减少;花粉萌发数与花药开裂状况呈极显著的相关关系,进而表现出主穗结实率与柱头上花粉萌发数呈显著的相关关系;主穗日结实率在高温下呈递减趋势,且Moroberekan较N22的下降速率显著加快,表明耐热品种与高温胁迫对结实率存在累积效应,而且高温胁迫效应发生在开花授粉之前。
Greenhouse pot experiments were carried out to study the main physiological responses of heat-tolerant variety Nagina 22 （N22）under high temperature（HT） stress during flowering period,indoor growth chamber was used for the HT conditions for all tested varieties. The results show that： under HT stress,the flowering stage of N22 did not change but the daily flowering amount of spikelet manifested the peak-lag; anther dehiscence blocked and germinated pollen on the stigma reduced with a significant level（P 〈 0.05）in heat sensitive variety Moroberek- an compared with the N22 ; there was a significant relationship between the number of germinated pollen on the stig- ma and anther dehiscence, and then showed a strong relationship between seed-setting and the number of germinated pollen on the stigma; main tiller seed-setting was decreasing under HT, and the decline-rate significantly speeded up in Moroberekan compared with N22,indicating the true tolerance of N22 and the cumulative effect of HT stress on seed-setting,moreover, HT stress effect occurred before pollination.
出处
《植物遗传资源学报》
CAS
CSCD
北大核心
2012年第6期1045-1049,共5页
Journal of Plant Genetic Resources
