Effects of environmental factors on the shoot development of Quercus petraea seedlings - A methodological approach
Effects of environmental factors on the shoot development of Quercus petraea seedlings - A methodological approach
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DOI：
10.1016/s0378-1127(97)00093-5
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发表时间：
1997-10-01
影响因子：
3.7
通讯作者：
Collet, C
中科院分区：
文献类型：
--
作者：
Chaar, H;Colin, F;Collet, C
本研究的目的是确定各种形态成分的高度生长是否对环境因素（即根系竞争、霜冻和遮荫）敏感，并观察这些成分是否可以用来量化环境胁迫对无根栎幼苗高度生长的影响。测量了以下成分：主茎上产生的冲洗次数，每次冲洗期间生长单位（GU）的长度，每年GU的长度，每个GU的节点数以及每个GU的顶芽状态。所有环境处理都减少了冲水量。年GU长度与冲花数呈正相关。草的竞争减少了每期的谷草长度，从而减少了年谷草长度。另一方面，部分遮荫增加了每一冲刷的谷长和年谷长。节点数受环境因素影响不明显，与GU长度呈正相关。在影响顶芽死亡的因素得到部分控制的情况下（即在草竞争和遮荫试验中），顶芽死亡率较低（草竞争试验中第一次同花顺的GUs为5%），但在霜冻试验中顶芽死亡率较高（第一次同花顺的GUs为64%）。讨论了不同形态组分对环境因子的敏感性，并利用广义线性模型定量分析了环境因子的影响。(C) 1997爱思唯尔科学有限公司
The objective of this study was to determine if various morphological components of height growth were sensitive to environmental factors (i.e., grass root competition, frost and shading) and to see if these components could be used to quantify the effect of environmental stress on the height growth of sessile oak (Quercus petraea Liebl.) seedlings. The following components were measured: number of flushes produced on the main stem, length of the growth unit (GU) developed during each flush, annual GU length, number of nodes per GU, and state of the terminal bud of each GU. The number of flushes produced was reduced by all environmental treatments. The annual GU length was positively related to the number of flushes produced. Grass competition reduced GU length in each flush and therefore reduced annual GU length. On the other hand, partial shading increased GU length in each flush and annual GU length. Number of nodes was not apparently affected by environmental factors and was positively related to GU length. Where factors that affect terminal bud mortality were partially controlled (i.e., in grass competition and shading experiments), mortality rate was low (5% for GUs of the first flush in grass competition experiment), but in the frost experiment terminal bud mortality rate was higher (64% for GUs of the first flush). The sensitivity of the different morphological components to environmental factors and the quantification of the effects of the factors using generalized linear models were discussed. (C) 1997 Elsevier Science B.V.