Studies on the Pollination Vectors of Cycas enlongata

Abstract:

The pollination vectors of Cycas elongata were studied using exclusive method and introduction insects. The results showed that the seed setting were 55.3% and 57.2% by wind and insect as pollination vector, respectively, which were lower than that under natural pollination (63.5%). The pollinating peak of C. elongata was at the day, and little in the dark. The pollen grains by wind were more within 3 m from the male plant, and decreased markedly over 3 m. It was conclude that wind and weevils were effective pollination vectors for C. elongata, which inconsistent that Zamiaceae was host-specific insect pollination.

Key words:Cycas elongata; Pollinate; Wind-pollinated; Insect-pollinated