Macrocystis and Nereocystis and is distinguished by its heteromorphic ALTERNATION OF GENERATIONS in which a large sporophyte alternates with a microscopic gametophyte, and in which growth takes place in a special meristem region on the surface of the thallus.

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In the course of the differentiation and development, some new characters of morphogenesis were found, and the mechanism of early development of rudimentary panicle were understood further, with which recent progress made in angiosperm shoot apical meristem structure and function were discussed.

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LFY-like genes play important role in plant development, when they were first isolated from mutants of Antirrhinum and Arabidopsis, they were thought to be "SAM-specific-determinating-genes", regulating the transition from inflorescence to flower meristem. However, further research revealed that LFY-like

LFY類基因在植物形態(tài)建成過程中具有重要作用，根據(jù)其突變體的特征av在线免费亚洲天堂，曾一度被認為是在花分生組織和花序分生組織中特異表達的"分生組織特征決定基因"久久久这里有精品视频，控制花序分生組織向花分生組織的轉變。

Maintenance of stem cell number in shoot apical meristem is essential for the generation of later organs.

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Studies on tip meristem culture rapid propagation and induction of in vitro stolon of manyflower betony stachys floridana schuttl .

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Three major embryonic tissue systems,shoot apical meristem,root apical meristem,and the differentiation of procambial strands,were visible in torpedo-stage somatic embryo.

三種主要的胚性組織系統(tǒng)包括芽頂端分生組織，根頂端分生組織和原形成層束在魚雷形胚階段清晰可見在线播放国产精品二区一二区四区。

The promeristem is consisted of three groups of initial cells, which have typical cytological characteristics of meristem cells. The primary meristem is composed of calyptrogens, primordial epidermises, periblems and pleromes. Both the calyptrogens and the primordial epidermises initiate from the same layer of initial cells.

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The embryo consists of a hypocotyls-root axis, with a rootcap and apical meristem at one end and an apical meristem and several cotyledons, or seed leaves, at the other.

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Can improve the survival ratio of seeding. Culturing in hormone media can make meristem tip survive once time, and the result is better than two-time-cultivation.3黄色无码区一区二、The meristem tip with two phyllomes(0.3-0.4mm in size)were found to suitable for virus-free seeding culture that were cut from aseptic seeding, which led to higher survival and virus-free ratio, up to 72.1%and 54.2%.

在培養(yǎng)基中添加椰汁、香蕉汁等有機添加物可以明顯提高成苗率.玖玖玖玖玖玖久。3家庭乱伦亚洲色图、采用二次剝離莖尖的方法，從無菌試管苗上切取帶2個葉原基(大小0.3-0.4mm)莖尖分生組織培養(yǎng)杭州最疯狂一级毛片视频，成苗率為72.1%最新自拍网站，脫毒率為54.2%男女超爽无遮挡全过程免费。

Somatic embryos can be produced both from the surface and the inner of the calli. Embryogenic cell has normal shape, dense cytoplasm , clear nucleolus, hearty metabolize; Plantlet regenerations were developed from global embryo, heart-shaped embryo, torpedo-shaped embryo and cotyledon embryo, in which the V-shaped vessel vascular bundles and shoot tip meristem and root tip meristem were observed.

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