题目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...
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 ...
Auxin is a naturally occurring plant hormone. It is produced at the tip of growing shoots and roots. It is a growth hormone and promotes cell elongation.
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 remains of the Cholondy-Went theory?
After the addition of B, another shoot took over the apical dominance in damaged trees resulting in a bend on the stem or in a double top. Height and volume growth continued. Boron deficiency has been observed in several N addition experiments in the Nordic countries, especially in regions ...
As a result, a new shoot will emerge from the growing point on the inserted bark which will then acquire apical dominance. Cut back is done when it becomes certain that there is a union which may take15 days or more. The inserted patch of bark will remain green or otherwise brownish dep...
The evolution of plants to efficiently transport water and assimilates over long distances is a major evolutionary success that facilitated their growth and colonization of land. Vascular tissues, namely xylem and phloem, are characterized by high specia
They also affect cell elongation (tropism), apical dominance, and fruit drop or retention. Gibberellins affect cell division, flowering, size of fruit and leaves, and they are important in overcoming seed dormancy. Cytokinins promote cell division, aging in leaves, and influence cell differentiation...
Growth is a widely used term in plant science and ecology, but it can have different meanings depending on the context and the spatiotemporal scale of analysis. At the meristem level, growth is associated with the production of cells and initiation of new organs. At the organ or plant scale...
we review these studies and discuss the various factors that contributed towards shaping the leaf; initiated as a small bulge on the periphery of the shoot apical meristem (SAM) followed by asymmetric outgrowth, expansion and maturation until final shape is achieved. We found that the underlying ...