热胁迫对辣椒花粉发育及其生活力的影晌

Effect ofHeatstress on Pollen DevelopmentandPollen Viahility Of Pepper

用光学和荧光显微镜及扫描电镜观察等方法，研究了热胁迫对辣椒花粉形成发育、生活力、萌发率及雌性系统的影响。发现辣椒不同耐热性品种在高温胁迫下，花粉、花药发育过程出现异常，花粉生活力、体外萌发率下降，花粉管生长延迟，正在生长的花粉管伸长停滞。这些影响感热性品种比耐热性品种表现更为明显。在雌性系统中未见明显影响。

Based on the observation wlthoptlcalmlcroscopy, fluorescence mlcrosco-pyand SEM methods, the effectofheatstress on POllendevebpment, POhn vlablllty,POllen germlnablllty and female—system ofC叩slcum annum var.汉ossum SeMi. were sin- died. Hish temperature stress causeu atinorma!九忧fopment or polen and anther, de·crease ofboth POllen vlabllltyand In vltro germlnablllty, andgrowthdeky ofPOllentubeIn style. These phenomena were more ev诅ent In thermo—sensitive cultlvar than Inthemo—to!erant cultlvar, while no obvious effects were examined on female system at thesame heat stess. The reletlve problems and the osslbllltyofusing POllengermlnablllty as arIndex ofthrmotolerance were discussed In the papper.