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The Pollination Biology of Phrynium Oliganthum

Author: DuanYouAi
Tutor: LiQingJun
School: Xishuangbanna Tropical Botanical Garden
Course: Ecology
Keywords: Flower biology Stamens protandrous Secondary pollen show Style movement Orderly foraging Marantaceae
CLC: Q945
Type: Master's thesis
Year: 2008
Downloads: 95
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Abstract

The arrowroot plant stamens first cooked (protandry), the characteristics of the the secondary pollen show (secondary pollen presentation) and irreversible explosive style movement (explosive style movement), creating a unique pollination mechanism. Our main to spend less Zhong Ye Phrynium oliganthum for the experimental material, biological characteristics of its flowers, pollination manipulation experiments and pollinator behavior observed three has done a systematic study, intended to grasp the basic flower morphology and reproductive characteristics of the plant. . Spend less Zhong Ye is a perennial understory herb, with high clonal? The the ellipsoid humorous sigh downtown coral, vase Pu Participation See all lies ? Spend less Zhong Ye have complex floral structure relationship and staminodes form, precisely because of these characteristics spend less Zhong Ye unique pollination mechanism. Late in the bud, the pollen sacs that split, pollen is transferred to the the stigma back of pollen pan, forming secondary pollen show (secondary pollen presentation). After flowering, the style in the cap-like degradation the stamens of bondage under state growth into bending momentum staminodes develop into the subsidiary structure - a \draw nectar) will lead to the release of the style tension, the irreversible bending movement style in an instant. In this process, the stigma front recess scraped pollinators who carry pollen, and then output to the pollen from the pollen disc pollinators body. The formation of the separation of the input and output in the time - space on the one hand, the delicate pollination mechanism makes pollen, both conducive stigma accept pollen, can also be effective to avoid self-pollination. But on the other hand, this mechanism also exists a potential price, because of the irreversible nature of the style movement, each flower only once pollination. Spend less Zhong leaves two flowers per bracteoles Total a floral axis, at the same time opening up a mirror spent on sugar concentration level of statistical significant difference exists, but it has nothing to do with the position of flower single flower, not observed between the single flower to flower to pollinators in each group have visited selective. The pollination experiment results show that, spend less Zhong Ye self-compatible, but there is no mechanism automatically self pollination process depends on pollinators. Pollinators to visit flowers daily along fixed routes, called orderly foragers (trapliner), living alone bees (no pad bee Amegilla to spp.) Pollination experiments, under artificial pollination natural state, the fruit rates are very low (lt; 10%), which may be due to resource constraints and severe inflorescence rot and insect food. Spend less Zhong Ye daily flower number about 11, but it does not sync, but successive open within 4 h, this flowering pattern together with pollinators repeating the same line day visit characteristics favor spend less Zhong leaves a certain extent, reduce the incidence of cross-pollination of the same strain, increasing the chance of outcrossing. Despite the adoption of these descriptive study, we spend less Zhong Ye pollination biology with a basic understanding of the significance of its pattern of mating system and explosive style movement needs in-depth study.

The Pollination Biology of Phrynium Oliganthum

Abstract

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