湖北光周期敏感核不育水稻(HPGMR)其育性转换的主导因子为日照长度,即在人工控制的日照长度大于14h条件下抽穗的稻株,花粉败育,不能正常结实,但雌蕊发育正常;在日照长度小于13h条件下抽穗的稻株,表现为雄性可育,能正常结实。为了从生理代谢角度探讨HPGMR 58s光合产物运输的特点,本文用~32P标记水稻植株,研究了58s在不同日长条件下~32P的吸收与分配。 1 材料和方法供试材料为58s,盆栽,当稻株达到4.5～5叶期时开始,每天用9h的短日照(SD)处理,诱导幼穗分化。然后将稻株分为两组:一组继续在短日条件下生长;另一组移到光照强度为1250lx(稻株顶部),每日为14h的人工控制的长光照(LD)下生长。当植株扬花 The dominant factor of fertility transformation in Hubei photoperiod-sensitive genic male-sterile rice (HPGMR) was the length of insolation, that is, the rice plants which were heading under the controlled sunlight duration of more than 14h, the abortion of pollen was not normal, but the pistil was normal The rice plants heading under the condition that the sunshine duration was less than 13 hours showed male fertility and normal sturdiness. In order to explore the characteristics of photosynthetic transport of HPGMR 58s from the perspective of physiological metabolism, rice plants were labeled with ~ 32P and the uptake and distribution of ~ 32P under different daylength conditions were studied. 1 Materials and methods The test material for 58s, potted plants, when the rice plants reached 4.5 to 5 leaf stage, the daily use of 9h short-day treatment (SD) to induce spike differentiation. The rice plants were then divided into two groups: one group continued to grow under short-day conditions; the other group was moved to long-light (LD) growth under manual control with a light intensity of 1250 lx (top of rice plants) for 14 h daily. When plants flowering