濒危植物蒙古扁桃花粉活力和柱头可授性研究

用过氧化氢酶法测定蒙古扁桃花粉的活力和寿命,用联苯胺-过氧化氢法测定柱头可授性。结果表明,蒙古扁桃花粉活力在散粉后第2天最高,3d后活力迅速下降,三种类型的植株的花粉活力下降速度存在差异,其活力可持续30d左右。短柱头植株柱头在开花后1d可分泌黏液,长柱头和中柱头花植株的柱头在开花后2d才分泌黏液,短柱头分泌黏液的持续时间较后者长。柱头可授性持续时间同种之间也存在差异,长柱头和中柱头植株可达6d,而短柱头花植株可持续10d左右。

Pollen viability and stigma receptivityof Prunus mongolica Maxim

Pollen viability and life span of Prunus mongolica Maxim. was evaluated by oxide-enzyme method. The stigma receptivity was estimated by benzidine-H_2O_2 method. The results were as follows:pollen viability of P.mongolica was the highest at the second day after shedding pollens,and its viability declined sharply after 3 d. Pollen viability of P.mongolica lasted about 30 d,but pollen viability of three genetypes of plants decline rate was different. The short stigma of P.mongolica secret mucus 1d after shedding pollens,yet the middle and long stigma secret mucus 2 d after shedding pollens. Lasting period of screcting mucus of short stigma was longer than middle stigma. The stigma receptivity was different between same species. The middle and long stigma receptivity was 6 d,the short stigma lasted about 10 d.