缙云山四川大头茶花粉游离脯氨酸含量与生殖产量特征研究

四川大头茶（Gordonia acuminata）是缙云山亚热带常绿阔叶林的优势树种之一，在缙云山的很多群落类型中均有分布。对缙云山四川大头茶的花粉游离脯氨酸含量的影响因素以及花粉游离脯氨酸含量与四川大头茶生殖产量之间的关系进行了研究。研究表明，缙云山四川大头茶的花粉游离脯氨酸含量不受植株年龄大小的影响，但与植株所处的群落类型有很大关系。常绿阔叶中四川大头茶的花粉游离脯氨酸含量最高，四川大头茶纯林中次之，针阔混交林中四川大头茶花粉游离脯氨酸含量最低。四川大头茶花蕾产量和果实产量随植株年龄的增大而增大，但座果率与植株年龄大小无关。对花粉游离脯氨酸含量与花蕾产量、果实产量和座果率之间的相关关系分析,花粉游离脯氨酸含量与花蕾产量不具有相关关系，与果实产量具有正相关关系，与座果率具有极显著正相关关系。这证实了与受精作用无关的生殖产量特征不受花粉游离脯氨酸含量影响，而与受精作用有关的生殖产量特征将受花粉游脯氨酸含量影响的研究假设。由于与花粉游离脯氨酸含量呈极显著正相关关系，座果率具有和花粉游离脯氨酸含量一样的群落间变化模式。

Studies on pollen free proline content and features of reproductive yields of Gordonia acuminata in Jinyun Mountain

Gordonia acuminata is one of the dominant tree species of evergreen broad leaved forest in Mt.Jinyun, and it occurs in many communities. In the present study, the factors affecting free proline content in pollen of Gordonia acuminata in Mt.Jinyun, and the relationships between pollen free proline content and reproductive yield features of G.acuminata were investigated. It was found that pollen free proline content of G.acuminata in Mt.Jinyun could not be affected by plant age, rather influenced by the community in which plants were growing. G.acuminata plants in evergreen broad leaved forest had the highest pollen free proline content the plants in G.acuminata forest had the intermediate, and the lowest pollen free proline content in the plants was found in G.acuminata Pinus massoniana mixed forest. Apart from fruit setting rate, flower bud yields and fruit yields of G.acuminata plants increased with age. The correlation analysis showed that pollen free proline content was not correlated with flower bud yields, but correlated with fruit yields and very significantly correlated with fruit setting rate. This result confirmed the hypothesis that fertilization related reproductive yield features are affected, and fertilization unrelated reproductive yield features are not affected by pollen free proline content. Due to the very significant correlation with pollen free proline content, fruit setting rate of Gordonia acuminata had the same variation patterns as pollen free proline content among the three communities investigated.