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Studies on the Reproductive Biology of Musella Lasiocarpa

Author: TianJie
Tutor: LiZhengHong
School: Chinese Academy of Forestry
Course: Ornamental Plants and Horticulture
Keywords: Musella lasiocarpa Biology Mating system Embryology Floral Sex
CLC: S682.19
Type: Master's thesis
Year: 2008
Downloads: 72
Quote: 1
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Abstract


Musella lasiocarpa (Musella lasiocarpa (Fr.) CYWu ex HWLi) Musa Musella lasiocarpa case with high ornamental value perennial the large forested herb unique species, mainly distributed in central Yunnan, western as well as parts of Sichuan 1500 to 2500 meters above sea level, the mountain slopes. An important ornamental, medicinal, edible, feed, and ecological value in use. The principles and methods of this study, the use of reproductive biology, Musella lasiocarpa flowers gender temporal and spatial distribution and fertility analysis, biological characteristics, mating system, embryology four aspects of analysis research aims to develop the proper protection and election breeding strategy phylogenetic study provides a theoretical basis. 1. Spend the gender of the spatial and temporal distribution and fertility analysis: Musella lasiocarpa species is monoecious meanwhile reciprocal curvatures of stigmas play a role of reducing interference. Specifically, the first ripe female, male and female flowers meanwhile reciprocal curvatures of stigmas play a role of reducing interference, not entirely male and female meanwhile reciprocal curvatures of stigmas play a role of reducing interference, single wheel synchronization male and female meanwhile reciprocal curvatures of stigmas play a role of reducing interference. Inflorescence bottom to top open: female flowers infertile flowers (no ovule and anther), functional male flowers. Only female flowers can be strong. Not heated greenhouse flowering from February to September of each year, the second year in February, no year before flowering plants withered old inflorescence can remain open. Single flower of female flowers six days, five days infertile flowers and functional male flowers. The female flowers per plant flowering for 15-40 days flower of infertility for five days, and functional staminate flowering approximately 10-300 days. 2 Biological Characteristics: yellow, saffron ground Chung lotus plant morphology difference bracts, green pseudostem, petiole back, color, yellow flower plant, safflower plants were reddish, sub-strains of safflower plants sprouted again flowering bracts color consistent with the mother plant, stable traits; Both pollen morphology; 10 reached a very significant difference in the level of 15 floral traits; the four fruit traits such as fruit size differences were not significant; the safflower plants naturally clonal propagation capacity below annua plants reached a very significant level, annua plant with greater competitiveness, better adapt to environmental changes. The safflower plant ground stems and inflorescence longitudinal diameter, the inflorescence transverse diameter was highly significant positive correlation. The ground diameter size as predicted inflorescence size indicators. Musella lotus seed embryo storage size did not change significantly after five months. Mating system study: artificial pollination should select the flowers after 1-2 days may be granted most of stigma and yellow flowers 2 d, 3 d after the red flowers pollen for hybridization. 4 ℃, the most effective to keep the pollen fertility, storage time should not exceed 10 days. Musella lasiocarpa open pollination can be strong, there is no apomixis. Safflower, yellow flowers plants the hybrid pro and hope to obtain a series of new color varieties through hybridization. Self-compatible and can be normal knot species. Embryology Research: Megasporogenesis and female gametophyte development, Micromonospora the original plant ovule nucellus type of thick nucellus and tenuinucellate of two kinds. The embryo sac is monospores Polygonum type. Ovules anatropous, lacoste been inner integument is composed by two layers of cells before the outer integument differentiation, inside and outside the beads together to form a linear micropyle the micropyle pointing to the placenta direction; microsporogenesis and male gametophyte development Lotus Yongjin drug four rooms, anther wall formation is a basic type microspore mother cell meiosis successive cytokinesis to form a T-shaped, straight, tetrahedral or symmetrical shaped tetrad , mature pollen cell type.

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CLC: > Agricultural Sciences > Gardening > Ornamental Horticulture ( flowers and ornamental trees) > Perennial Flowers > Perennial Flowers Class > Other
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