What isapical dominance? Why do plants have apical dominance? (6marks)相关知识点: 试题来源: 解析 植物主茎顶芽生长快,侧芽生长慢甚至不明发的现象称为顶端优势。产生顶端优势的原因至今不清楚,主要在下列假设。 (1)营养假说, 认为顶芽是一个“营养库”,它优先利用营养物质,使侧芽由于营养缺乏而受到抑制。 (...
An axillary bud is formed at the corner between a leaf and the stem, giving rise to the branch or lateral shoot. The auxiliary bud remains dormant for some time due to a phenomenon called apical dominance. By removing the shoot tip, growth of these auxiliary buds occurs, thereby producing ...
The development of PH largely depends on altered morphometric characteristics of the shoot apical meristem (SAM) (Fig. 1). In higher plants, SAM consists of the central zone (CZ), the organizing center (OC), and the rib zone (RZ) located below the CZ. The RZ is responsible for the elo...
The transition of plants from aquatic ecosystems to land, which occurred over 400 million years ago [1], marked a defining moment in the history of the Earth. This transition was characterized by radical transformations in plant body plans, including the establishment of sporophyte dominance and th...
mcqs on gibberellin in plants mcqs on cytokinins for neet auxin function cell elongation: auxin promotes elongation in shoots and coleoptiles. plasticity of the cell wall is increased by acidification cell division and differentiation: auxin promotes healing. it helps in cell differentiation and ...
A large part of total biomass is stored as compounds that form the structure of plants: cellulose and lignin in the cell walls, lipids in the membranes, and proteins within the cell (Fig. 1e). Another part of total biomass is stored in the form of nonstructural carbohydrates (NSCs; ...
1. 1. Reviewing the literature on apical dominance in the light of the "PESIGS" rules formulated in the preceding paper (Jacobs, 1959) made clear that earlier researchers had never demonstrated exact substitution of synthetic auxin for the native auxin of the apex. 2. 2. Our clone of ...
Evolutionary patterns in auxin action including tropisms, apical dominance, and rhizoid initiation, which are subject to IAA regulation that resembles the hormonal control over corresponding responses... TJ Cooke,DB Poli,AE Sztein,... - 《Plant Molecular Biology》 被引量: 421发表: 2002年 What re...
Likewise, the necessity of transporting bulky scions is eliminated. However, the clones produced take a longer time to develop into the right sizes for outplanting than grafted seedlings. Various techniquesare used, mostly applicable to young plants in active growth with stems in which the bark is...
Man has also synthesized compounds that act like auxins in plants and these include: alpha-Naphthalene acetic acid (NAA) 2,4-diclorophenoxyacetic acid (2,4-D), The herbicide, NAA is a molecule that is very similar to IAA, and mimics IAA in plants – plants can’t really tell the diff...