|本期目录/Table of Contents|

[1]王爱波.毛穗旱麦草小穗不同位置种子吸水特性与萌发期抗旱性[J].江苏农业科学,2016,44(08):497-499.
 Wang Aibo.Imbibition characteristics and drought resistance at germination stage of seeds from different positions in spikelets of Eremopyrum distans[J].Jiangsu Agricultural Sciences,2016,44(08):497-499.
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毛穗旱麦草小穗不同位置种子吸水特性与萌发期抗旱性(PDF)
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《江苏农业科学》[ISSN:1002-1302/CN:32-1214/S]

卷:
第44卷
期数:
2016年08期
页码:
497-499
栏目:
资源与环境
出版日期:
2016-08-25

文章信息/Info

Title:
Imbibition characteristics and drought resistance at germination stage of seeds from different positions in spikelets of Eremopyrum distans
作者:
王爱波
商丘学院风景园林学院,河南商丘 476113
Author(s):
Wang Aibo
关键词:
毛穗旱麦草吸水特性萌发期抗旱性种子位置效应“两头下注”
Keywords:
-
分类号:
Q945
DOI:
-
文献标志码:
A
摘要:
毛穗旱麦草[Eremopyrum distans (C. Koch) Nevski.]是广泛分布于准噶尔荒漠的禾本科1年生短命植物。本试验对其小穗自基部向上第1、2、3位置(分别定义为第1、2、3组)种子的吸水特性与萌发期抗旱性进行了研究,分析了3个位置种子在2种特性上的差异,探讨了种子位置效应的生态适应意义,主要研究结果:(1)毛穗旱麦草小穗第3组种子的吸水速率显著高于第1、2组种子的吸水速率,据此推断第3组种子比第1、2组种子更易于利用荒漠中的水分进行萌发。(2)第1、2组种子在干旱胁迫下与对照相比萌发率下降幅度较小,而第3组种子在干旱胁迫下与对照相比萌发率下降幅度较大,表明第1、2组种子萌发期抗旱性较强而第3组种子萌发期抗旱性较弱。毛穗旱麦草小穗不同位置种子具有不同的吸水特性和萌发期抗旱性,揭示了一种“两头下注”策略,是种子位置效应的体现,有利于物种在具有高度时空异质性的准噶尔荒漠环境中定居和扩大居群。
Abstract:
-

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备注/Memo

备注/Memo:
收稿日期:2015-11-09
基金项目:国家自然科学基金青年科学基金(编号:41301051)。
作者简介:王爱波(1983—),女,河南济源人,硕士,讲师,主要从事植物种子生态学和作物栽培学的研究。E-mail:ab0629@126.com。
更新日期/Last Update: 2016-08-25