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Research on the Structure Botany Character of Acanthopanax Sessiliflorus

Author: WangZuoZuo
Tutor: LuJingMei；ZhuJunYi
School: Northeast Normal University
Course: Botany
Keywords: Aureobasidium five plus Vegetative organs Reproductive organs Variable temperature stratification Structural Botany Characteristics
CLC: S567.19
Type: Master's thesis
Year: 2011
Downloads: 34
Quote: 0
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Abstract


In this paper, scanning electron microscopy study Aureobasidium five plus (Acanthopanax sessiliflorus Seem) the morphology of the vegetative organs and genital development process . The variable temperature stratification processing promote differentiation Aureobasidium five plus seed embryo development , and to observe the process . The study found that : 1 . Aureobasidium five plus root secondary vigorous growth , secondary structure developed , the rings were clearly catheter for single pores evenly distributed ray cell growth ring which has a large number of primary pit field . 2 . Aureobasidium five plus stems when they enter secondary growth, initial growth , epidermal cells , multi-layer, but irregular arrangement the cortical cells multilayer internal split -type resin Road , the nascent vascular bundles outside the tough vascular , majority, tightly packed , stem the growth of the late epidermal cells multilayer arrangement rules neatly near the cortical cells of the epidermis to form the cork cambium and the formation of a small amount of cork layer and phelloderm resin ducts , vascular cambium formation times xylem , secondary phloem , wood rays and phloem rays. Aureobasidium five plus adaxial surface of the leaf epidermal cells tightly packed glandular hairs distribution , the table leather abaxial stomata , the stomata are distributed in the veins at . The midrib vascular bundles arranged near the ring . Mesophyll palisade and spongy tissue cells . Petiole nearly circular, vascular bundles 7-8 beam . 4 . Aureobasidium five plus spend 5 radix tepals and stamens are five stamen development early pistil development spherical stamen through the prism stamens , developed with four sachets of stamen pistil 2 carpels formed by two carpel primordia the connate single pistil , stigma bifid . Aureobasidium five plus seed columnar long - Shield Round ; endocarp surface is rough and not structured ; endocarp inside tiny stripes and mosaic ; cross-section of the endocarp cells consists of two parts , the outer multilayer The innermost layer 1 . Aureobasidium five plus seed dormancy is a complex morphological and physiological dormancy , the embryo must be cooked after the morphological and physiological cooked two different stages . Mature seed in warm temperate conditions continue to divide by the heart-shaped embryo cotyledons , plumule , hypocotyl , radicle , reach morphology mature , have the basic conditions for germination . After a certain period of physiological cooked to complete the development of the embryo . After breaking dormancy by low temperature stimulation until germination .

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