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Effects of Different Soil Nutrients on Clonal Growth and Sexual Reproduction in Iris Japonica Thunb.

Author: LiQingYu
Tutor: ZhongZhangCheng
School: Southwestern University
Course: Ecology
Keywords: Butterfly flower Clonal growth Sexual reproduction Reproductive allocation Trade-off between
CLC: S682.19
Type: Master's thesis
Year: 2006
Downloads: 76
Quote: 0
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Abstract


In order to study the soil nutrients the butterfly flower clonal growth and sexual reproduction in order to explore its effective response to the heterogeneity of soil nutrients, as well as adaptive responses in sexual reproduction. Butterfly flower field experiments high, medium and low level of nutrients (N, P, K) processing, growth characteristics, reproductive characteristics, reproductive allocation, clonal growth and sexual reproduction trade-off relationship. The results show that: the different levels of soil nutrients significantly impact genets source strains, two ramets and three ramets height. Genets of different soil nutrient levels Pansy source strains, at all levels of ramets plasticity (branching intensity interval sub interval sub weight) of a hierarchical nature, impact ramet density difference was not significant. Nutrient levels significantly affect genets shoot ratio: shoot ratio tended to decrease with increasing soil nutrient levels. Reflect the irises the genets via increased root biomass allocation, enhanced root nutrient absorption potential, to further compensate for the nutrient environment may take advantage of lower. The inflorescence axis height, branching intensity and biomass no significant reaction occurs on the nutrient level. With increasing soil nutrient levels, the butterfly spent the outer ring of petal length and width, the inner wheel petal length and width, pistil length, stamen length and the corolla diameter are gradually increased, the difference is significant. Soil nutrient levels butterfly flower per plant flowering number of impact is not significant. Single flower biomass has shown high nutrient levels were significantly greater than the low nutrient level. Butterflies flowers per plant the number of fruits per plant Block fruit rate response to nutrient levels the difference was not significant. Single fruit biomass and single fruit peel biomass response to nutrient levels did not differ significantly. No significant difference between seed weight of each nutrient levels. Butterfly flower reproductive allocation was no significant difference between the level of each nutrient. Butterfly flower unit biomass of the number of trees and the number of fruits / plant, fruit rate / plant, plant height, fruit / fruit and seeds / strains negative correlation between where fruit weight / fruit and seed number / plant there is a very significant correlation. The ramets generation negative impact to some extent put into butterflies spend the resources of sexual reproduction. In short, the butterfly spent the clonal growth and sexual reproduction contribute to to reveal the natural state cloned plants for nutrients plaque heterogeneity of ecological adaptation responses, as well as clone the trade-off between growth and sexual reproduction strategy. From the side reflects the evolutionary significance of sexual reproduction in clonal plants. Can also deepen the understanding of the mechanism of clonal growth and awareness of the population, adaptation and adjustment mechanisms, to provide a reference for theoretical studies of clonal plants.

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