Effects of Saline-Alkaloid Stress on Seed Germination and Seedling Growth of Grasses

doi:10.11733/j.issn.1007-0435.2012.05.019

›› 2012, Vol. 20 ›› Issue (5): 914-920.DOI: 10.11733/j.issn.1007-0435.2012.05.019

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Effects of Saline-Alkaloid Stress on Seed Germination and Seedling Growth of Grasses

SHEN Zhong-bao¹, PAN Duo-feng¹, WANG Jian-li¹, ZHANG Rui-bo¹, LI Dao-ming¹, GAO Chao¹, DI Gui-li¹, ZHONG Peng²

1. Institute of Forage and Grassland Sciences, Heilongjiang Academy of Agricultural Sciences, Harbin, Helongjiang Province 150086, China;
2. Institute of Soybean Sciences, Heilongjiang Academy of Agricultural Sciences, Harbin, Helongjiang Province 150086, China

Received:2012-03-20 Revised:2012-08-11 Online:2012-10-15 Published:2012-11-01

混合盐碱胁迫对5种禾草种子萌发及幼苗生长的影响

申忠宝¹, 潘多锋¹, 王建丽¹, 张瑞博¹, 李道明¹, 高超¹, 邸桂俐¹, 钟鹏²

1. 黑龙江省农业科学院草业研究所, 黑龙江哈尔滨 150086;
2. 黑龙江省农业科学院大豆研究所, 黑龙江哈尔滨 150086

通讯作者: 潘多锋,E-mail:panduofeng2000@163.com
作者简介:申忠宝(1973-),男,黑龙江讷河人,硕士,副研究员,从事牧草育种和栽培方面的研究,E-mail:shzhbao2@126.com
基金资助:
"十一五"国家科技支撑资助项目(2008BADB3B04-3);黑龙江省科技厅科技成果推广重点项目(TC10B0703)资助

Abstract

Abstract: The effects of different saline-alkaloid stresses on both seed germination and seedling growth of five tested grasses were studied in this paper. Results showed that the low concentration of saline-alkaloid stress (concentration was 20 mmol·L^-1) improved the seed germination abilities of Leymus chinensis ‘Nongjing 11’ and Leymus chinensis, whereas high concentration decreased seed germination. Saline-alkaloid stress had little influence on Elytrigria repens ‘Nongjing 7’. The germination rate, germination index and vigor index of Bromus inermis ‘Nongjing 12’ and Roegneria nutans ‘Nongjing 3’ under saline-alkaloid stress were decreased comparing with control, and had negative correlation with stress concentration. The shoot height and root length of Leymus chinensis ‘Nongjing 11’ under 20 mmol·L^-1 saline-alkaloid stress increasing compared with control showed that the low concentration of saline-alkaloid stress promoted the seedling growth of Leymus chinensis ‘Nongjing 11’. Saline-alkaloid stress decreased the seedling growth of Leymus chinensis, Elytrigria repens ‘Nongjing 7’, Bromus inermis ‘Nongjing 12’ and Roegneria nutans ‘Nongjing 3’. The saline-alkaloid tolerance of 5 tested grasses was ranked as Elytrigia ‘Nongjing 7’>Leymus chinensis ‘Nongjing 11’>Leymus chinensis>Bromus inermis ‘Nongjing 12’>Roegneria nutans ‘Nongjing 3’.

Key words: Saline-alkaloid stress, Germination rate, Germination index, Vigor index, Seedling growth

摘要： 以农菁11号羊草(Leymus chinensis ‘Nongjing 11’)、农菁7号偃麦草(Elytrigria repens ‘Nongjing 7’)等5个禾本科牧草品种为试验材料,研究不同浓度(0,20,40,60,80,100,120 mmol·L^-1)混合盐碱(NaCl,Na₂SO₄,NaHCO₃和Na₂CO₃)胁迫对种子萌发及幼苗生长的影响,为牧草品种在盐碱化草地的建植提供参考。结果表明:低浓度胁迫(≤20 mmol·L^-1)可提高农菁11号羊草、东北羊草和农菁7号偃麦草种子的萌发能力,高浓度(>60 mmol·L^-1)降低种子萌发。农菁7号偃麦草各处理间的发芽率差异不明显(P>0.05),表明在试验设置的浓度范围内盐碱胁迫对其种子萌发影响不大。盐碱胁迫后农菁12号无芒雀麦(Bromus inermis ‘Nongjing 12’)和农菁3号垂穗鹅观草(Roegneria nutans ‘Nongjing 3’)的发芽率、发芽指数、活力指数均低于对照,且与胁迫浓度成显著负相关。混合盐碱浓度20 mmol·L^-1处理后农菁11号羊草幼苗的苗长和根长高于对照,其他浓度下低于对照。盐碱胁迫浓度大于20 mmol·L^-1时抑制牧草幼苗生长,浓度越高抑制作用越强。

关键词: 盐碱胁迫, 发芽率, 发芽指数, 种子活力, 幼苗生长

CLC Number:

Q945.78

SHEN Zhong-bao, PAN Duo-feng, WANG Jian-li, ZHANG Rui-bo, LI Dao-ming, GAO Chao, DI Gui-li, ZHONG Peng. Effects of Saline-Alkaloid Stress on Seed Germination and Seedling Growth of Grasses[J]. , 2012, 20(5): 914-920.

申忠宝, 潘多锋, 王建丽, 张瑞博, 李道明, 高超, 邸桂俐, 钟鹏. 混合盐碱胁迫对5种禾草种子萌发及幼苗生长的影响[J]. , 2012, 20(5): 914-920.

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Effects of Saline-Alkaloid Stress on Seed Germination and Seedling Growth of Grasses

混合盐碱胁迫对5种禾草种子萌发及幼苗生长的影响

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