人工授粉对大别山五针松结实率及种子特性的影响

Effect of artificial pollination on seed setting rate and seed characteristics of Pinus dabeshanensis

以大别山五针松为研究对象,分析自然授粉、套袋不授粉、套袋授同株粉及套袋授异株粉等4种不同人工处理下球果的结实率及种子特性等指标。结果表明:异株授粉处理下,大别山五针松球果的结实率最高,为100.0%,单个球果平均饱满种子数为50.0粒,显著高于其他授粉组;其次是自然授粉,结实率为97.5%,单个球果平均饱满种子数为30.9粒;同株授粉球果结实率为80.0%,单个球果平均饱满种子数为3.2粒;大别山五针松在套袋不授粉情况下结实率最低,仅为17.5%,且不产生有效种子。研究为阐明大别山五针松濒危的生殖学机制和制订科学的保育策略提供重要的理论依据。

The cone setting rate and seed characteristics of Pinus dabeshanensis were analyzed under four different artificial treatments including natural pollination,bagging without pollination,bagging pollination with the same plant and bagging pollination with different plants.The results showed that different plants in bagging pollination had 100.0%seed setting rate and 50.0 full seeds per cone which was significantly higher than other treatments;plants in natural pollination had 97.5%seed setting rate and 30.9 full seeds per cone;the same plants in bagging pollination had 80.0%seed setting rate and 3.2 full seeds per cone;while plants without pollination had only 17.5%seed setting rate and no full seeds at all.This study provided an important theory in clarifying the reproductive mechanism and formulating scientific conservation strategies for this endangered species.