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Studies on Palynological Classification and Characteristics of Nutrition and Physiology of Ginkgo Biloba .L

Author: ZuoLe
Tutor: LingYuPing
School: Yangzhou University
Course: Pomology
Keywords: Ginkgo Pollen Center of origin Period of dormancy Nutrients 32P
CLC: S792.95
Type: Master's thesis
Year: 2010
Downloads: 25
Quote: 0
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Abstract

Ginkgo (Ginkgo biloba) is the world's precious relict plant, with important research and development use value. This test test material to the main Ginkgo producing areas in China more than 100 years of real born male plant pollen and palynology its research classification, and the combination of geology and archeology speculated that there may be the origin of our Ginkgo center for the exploration of gingko center of origin palynology basis; determination of nutrients in the period of dormancy ginkgo tree analysis, to explore the variation of ginkgo in the period of dormancy nutrients, to provide a theoretical basis for rational fertilization and production practices; shows through 32P isotope tracking technology to study the absorption and distribution of the seedling stage ginkgo Phosphorus, provide the scientific basis for the seedling stage ginkgo rational application of phosphate fertilizer and the cultivation of seedlings. The results show that: 1 by scanning electron microscope and found that ginkgo pollen grain surface has a specific structure, such as holes and protrusions; sparse pollen exine texture differences, the pollen is divided into three types: Ⅰ, rough type II smooth, Ⅲ, intermediate; individual morphological differences found ginkgo pollen significantly through the determination of the individual forms of pollen, which is the expression of a diversity of germplasm resources, to some extent, reflect the different genotypes of male plants differences. By EDS analysis of ginkgo pollen found pollen in C gt; O gt; and P gt; Mg, and the four elements content differences around collecting pollen significant. 3, combined with individual ginkgo pollen morphological observation and spectroscopy analysis, cluster analysis. To infer the center of origin of ginkgo may exist: I, southwest of the center of origin, Ⅱ, the center of origin of East China, Ⅲ, North China the center of origin of clustering results, combined with the geology and archeology. Determination of nutrients in the period of dormancy Ginkgo branches found Ginkgo branches soluble sugar content showed a trend first and then decreased significantly and this trend of female plants than male plants, female plants twig soluble sugar content higher than male plants, 1 year old branches gt; 2,3 years old branches; branches starch content showed a trend first and then decreased up again male plants than female plants, this soluble sugar, 1, 2 and 3 years old branches starch content difference is not significant; the male plants branches protein content showed a trend first and then decreased, the female plants branches Sleep prophase than stable, late downward trend male plant branches protein content is higher than female plants, 3-year-old branches gt; 2-year-old branches gt; 1-year-old branches. Determination of nutrients in leaf senescence ginkgo male leaves, the soluble sugar content showed a trend of lower and lower first rose, 1-year growth of the vine leaves gt; 2-year-old spur on the leaves; leaf starch content showed a downward trend, the 1-year growth of the vine leaves gt; 2-year-old spur on the leaves; show a downward trend in the protein content in the leaves. 6 32P ginkgo Phosphate Absorption distribution measurement results from 1d to 7d the seedling stage ginkgo Pi uptake increased with the increase of culture time, the absorption rate from 2.63% to 4.56 %; from 7d to 14d the seedling stage ginkgo phosphorus absorption decreased significantly reduced from 4.56% to 3.23%. Phosphorus elements in various parts of the distribution ratio of stem gt; lateral root gt; taproot gt; leaves.

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