沙芥花粉萌发特性和柱头可授性的研究

 用培养基发芽法研究沙芥花粉萌发特性；用人工异株授粉法和联苯胺—过氧化氢法测定柱头可授期。结果表明：沙芥花粉萌发的最佳培养基是20%蔗糖+0.001%硼酸；花粉能够萌发的温度范围为15～38 ℃，最适萌发温度为25 ℃；从花蕾充分膨大期至开花后16 h花粉活力较强，开花后48 h花粉基本无活力；花粉储藏的适宜条件为低温（4 ℃），储藏期为7 d。柱头可授期为开花前48 h至开花后96 h，其中开花后24～72 h可授性强。

Pollen Germination Characteristic and Stigma Receptivity of Pugionium cornutum

Pollen germination characteristic of Pugionium cornutum (L.)Gaerner was evaluated by germination method on culture medium, its stigma receptivity was estimated by the hand cross-pollination and benzidine-H₂O₂ method. The results showed the optimal pollen germination of P.cornutum was on the culture medium added 20% sucrose and 0.001% boric acid. The effective temperature of pollen germination was from 15 ℃ to 38 ℃ and the optimal temperature was 25 ℃. The pollen germination rate was very higher from the biggest bud stage to 16 h after blooming, and the pollen viability was disappeared 48 h after blooming. The suitable condition of storing pollen was low temperature（4 ℃）, and storing period was 7 d. The stigma of P.cornutum had receptivity from 48 h before blooming to 96 h after blooming，the strong receptivity in 24—72 h after blooming.