芍药花粉活力和柱头可授性的研究

用TTC法测定了芍药花粉的活力和寿命,用联苯胺—过氧化氢法测定了其柱头的可授期。结果表明,栽培芍药单瓣花植株的花粉活力和重瓣花植株的花粉活力在开花初期(1～2d)无明显差别,但重瓣花植株的花粉活力比单瓣花植株的花粉活力下降快;通常情况下,花粉寿命约为7d。栽培品种的柱头有个体差异,单瓣花植株有的开花后2h即可分泌粘液,而重瓣花植株的柱头在开花后,有的一直不分泌粘液,有的在开花后两天才分泌粘液;单瓣花植株的柱头可授性比重瓣花植株的强,一般分别在开花后6d和3d之内具可授性。移栽的野生芍药植株的花粉活力比栽培品种下降的慢,其寿命也较长,一般为15d;柱头的可授性和粘液分泌比栽培植株强。

Pollen vitality and stigma receptivity of Paeonia lactiflora Pall

Pollen viability and life span of Paeonia lactiflora Pall. was evaluated by TTC(2,3,5 triphenyl tetrazolium chloride)test,its stigma receptivity was estimated by benzidine H2O2 method. The results were as follows: As to cultivated species,the pollen viability of P. lactiflora Pall. with simple flower was the same as that of P. lactiflora Pall. with double flower at the beginning of blooming. But the pollen viability declination of P. lactiflora Pall with double flower was quicker than that of P. lactiflora Pall with simple flower. In general,the life span of cultivated species was about 7 days. The stigma of cultivated P.lactiflora Pall with some simple flower could secret mucus 2 hour after blooming. As long as the stigma of cultivated P. lactiflora Pall with double flower was concerned,some didn't secret mucus all the time,others secreted mucus 2 days after blooming. The stigma receptivity of single cultivated plant was higher than that of cultivated P. lactiflora Pall. with double flower. Generally,they had receptivity within 6 days or 3 days after blooming. The pollen viability declination of wild P. lactiflora Pall was slower and its life span was longer than that of cultivated species. The life span of wild species was about 15 days,and its stigma receptivity and mucus secretion was higher than that of cultivated species.