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Research on Palynology and Female Gametophyte Development in Artemisia Frigida Willd.

Author: ShiXiaoJun
Tutor: LiQingFeng；WanTao
School: Inner Mongolia Agricultural University
Course: Ecology
Keywords: Artemisia.frigida Willd. pollen pollination megaspore
CLC: S812
Type: Master's thesis
Year: 2011
Downloads: 5
Quote: 0
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Abstract


In this paper,Artemisia frigida willd.which from some different habitats of Inner Mongolia as the tested materials,study with the morphological characteristics and cytological features,the use of pollen and reproductive biology research methods,conducted a special study of Artemisia frigida.Through research showed that: There are differes in pollen morphology of Artemisia.frigida Willd from different habitats,cold Artemisia pollen dimorphism phenomenon,namely,spherical and flat for the long ball.Artemisia.frigida Willd effective dissemination of pollen from more than 2cm,pollen dispersal peak at around 10 o’clock in the morning the amount of pollen dispersal and the temperature,humidity,wind speed and wind direction is directly linked to the mature sporangia of cracking depends on the small atmospheric temperature and humidity,wind speed will speed up the pollen shed.Sucrose concentration on pollen germination frigida affect the suitable concentration of sucrose solution on the germination of pollen frigida role in promoting the role of the low concentration of sucrose is not obvious,while the higher concentration of sucrose inhibited germination.Artemisia pollen germination in the cold light conditions have accelerated.Artemisia.frigida Willd.embryonic development is a single spore type embryo sac,thin nucellus;basal placenta;single ovule anatropous type;arranged in 4 linear megaspore appears,chalazal megaspore develops into the functional megaspore;mature embryo capsule is Polygonum type embryo sac.

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CLC: > Agricultural Sciences > Livestock, animal medicine,hunting,silkworm,bee > General Animal Science > Grassland Science,prairie school
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