| 黄土高原降雨梯度对刺槐不同器官内源激素 分布格局及生长的影响 |
| 陈克利1; 孟敏2; 张鹏2; 魏芙蓉2; 王国梁2,3
|
| 2020
|
发表期刊 | 水土保持研究
|
卷号 | 27期号:1页码:298-304 |
摘要 | 环境梯度如何影响树木不同器官内源激素分布格局,以及该内源激素格局变化如何影响树木不同器官的异
速生长,目前尚不是十分清楚。选择黄土高原地区不同降雨量梯度神木( 440.
8 mm / a )、绥德( 475. 4 mm / a )、安塞
( 505.
3mm / a )和淳化( 606. 1mm / a )地区的刺槐林为材料,比较其叶、枝和不同径级根(最细根( 0~1mm )、细根( 1~2
mm )、粗根( 2~5mm ))内源激素含量及其对器官生长的影响。结果表明:( 1 )随着降雨量增加, 3 种器官中玉米素核
苷( ZR )、赤霉素(
GA 3 )含量增加,脱落酸( ABA )含量整体下降;不同径级根系中 w ( ZR+GA 3 +IAA )/ w ( ABA ),
w ( GA 3 )/ w ( ABA ), w ( ZR )/ w ( ABA ), w ( IAA )/ w ( ABA )比值增加,但不同器官增幅不一致。淳化地区刺槐叶,枝,
最细根,细根和粗根中 GA 3 含量比神木地区分别高 55% , 21% , 274% , 376% 和 279% 。( 2 )降雨量相对较高的安塞和
淳化地区刺槐各器官年均累积量均显著高于降雨量相对较低的绥德和神木地区(
p <0. 05 )。( 3 )根系促生长类激素
( ZR , GA 3 和IAA )含量主要受降雨量和土壤全氮( TN )影响。( 4 )根系生物量与 ZR和 w ( ZR )/ w ( ABA )呈显著正相
关, w ( GA
3 )/ w ( ABA
)和
w ( ZR )/ w ( ABA )比值与枝生物量显著负相关。沿着降雨梯度,降雨量和土壤 TN 通过增加
不同径级根系中 ZR , GA 3 和 IAA 含量从而促进刺槐根系的异速生长。 |
其他摘要 | How environmental gradients affect the distribution pattern of endogenous hormones in different
organs of trees , and how the changes in endogenous hormone patterns affect the allometric growth of differ -
ent organs of trees are still not very clear.This study
selected different rainfall gradients of Shenmu ( 440. 8
mm / a ), Suide ( 475. 4mm / a ), Ansai ( 505. 1mm / a ) and Chunhua ( 606. 1mm / a ) in the Loess Plateau. Robin -
ia pseudoacacia ′s leaves , branches and roots of different diameters ( the finest root ( 0~1mm ), fine root
(
1~2mm ), coarse root ( 2~5mm )) content and their effect on organ growth were compared.The results
showed that :( 1 ) with the increase of rainfall , the contents of zeatin nucleoside ( ZR ) and gibberellic acid
( GA 3 ) increased , and the content of abscisic acid ( ABA ) decreased in all organs ; the ratio of different diame
-
ter roots w ( ZR+ GA 3 +IAA )/ w ( ABA ), w (
GA 3 )/ w ( ABA ), w ( ZR )/ w ( ABA ), w ( IAA )/ w ( ABA ) in -
creased , but the growth of different organs was inconsistent ; in Chunhua area , the GA 3 contents in the leav -
es , branches , finest roots , fine roots and coarse roots of the locusts were 55% , 21% , 274% , 376% and
279% higher than those in Shenmu area ;( 2 ) the average annual accumulation of the organs of Robiniapseudoacacia in Ansai and Chunhua areas with relatively
high rainfall was significantly higher than that in
Suide and Shenmu areas with relatively low rainfall ( p <0.
05 );( 3 ) the contents of root growth - promoting
hormones ( ZR , GA 3 and IAA ) are mainly affected by rainfall and soil total nitrogen ( TN );( 4 ) there is the
significant positive correlation between root biomass and ZR and w ( ZR )/ w ( ABA ) content , and w ( GA 3 )/ w
( ABA ) and w ( ZR )/ w ( ABA ) ratios are significantly negatively correlated with shoot biomass.Along the
rainfall gradient , rainfall and soil TN promote the allometric growth of the roots of Robinia pseudoacacia by
promoting the contents of ZR , GA 3 and IAA in roots of different diameter classes. |
关键词 | 内源激素
异速生长
降雨梯度
刺槐
|
收录类别 | 中文核心期刊要目总览
|
语种 | 中文
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文献类型 | 期刊论文
|
条目标识符 | sbir.nwafu.edu.cn/handle/361005/9992
|
专题 | 水保所知识产出(1956---)
|
作者单位 | 1.西北农林科技大学林学院 2.西北农林科技大学水土保持研究所 3.中国科学院 水利部 水土保持研究所
|
推荐引用方式 GB/T 7714 |
陈克利,孟敏,张鹏,等. 黄土高原降雨梯度对刺槐不同器官内源激素 分布格局及生长的影响[J]. 水土保持研究,2020,27(1):298-304.
|
APA |
陈克利,孟敏,张鹏,魏芙蓉,&王国梁.(2020).黄土高原降雨梯度对刺槐不同器官内源激素 分布格局及生长的影响.水土保持研究,27(1),298-304.
|
MLA |
陈克利,et al."黄土高原降雨梯度对刺槐不同器官内源激素 分布格局及生长的影响".水土保持研究 27.1(2020):298-304.
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黄土高原降雨梯度对刺槐不同器官内源激素分布格局及生长的影响_陈克利.pdf
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