不同群落中四川大头茶(Gordonia acuminata)花粉游离脯氨酸含量与种子产量

STUDIES ON POLLEN FREE PROLINE CONTENT AND SEED YIELD OF GORDONIA ACUMINATA IN DIFFERENT COMMUNITIES

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。对缙云山 ３种不同群落中四川大头茶的花粉游离脯氨酸含量和果实的种子产量进行了研究，发现花粉游离脯氨酸含量和每果种子产量在同一群落中的不同龄级四川大头茶个体间没有差异，但在不同群落间表现出差异。常绿阔叶林中的四川大头茶个体具有最高的花粉游离脯氨酸含量和每果种子产量，四川大头茶纯林中的次之，针阔混交林中的最低。分析发现，四川大头茶花粉游离脯氨酸含量与果实的种子产量有密切的正相关关系，花粉中的游离脯氨酸含量可以作为一种预测和比较相同地区不同生态环境中四川大头茶种子产量的指标。

Gordonia acuminata is a dominant tree species of subtropical evergreen broad-leaved forest on Mt. Jinyun,Sichuan. This study analyzed pollen free proline content and seed yield of G. acuminata in three different communities located in Mt. Jinyun. Results showed that pollen free proline content and seed yield per fruit of G. acuminata were not significantly different among G. acuminata plants of different ages growing in the same community, but were significantly different among three communities. Pollen free proline content and seed yield per fruit of G. acuminata plants showed highest in evergreen broad-leaved forest, lowest in Pinus massoniana-G. acuminata mixed forest, and intermediate in G. acuminata forest. Pollen free proline content of G. acuminata was closely positively correlated to seed yield per fruit of G. acuminata and this suggests that pollen free proline content can be used as an index for predicting and comparing seed yield of G. acuminata plants in different eco- environments of same region.