种质及变温对羊草种子萌发的影响

doi:10.11686/cyxb2017327

草业学报 ›› 2018, Vol. 27 ›› Issue (7): 103-111.DOI: 10.11686/cyxb2017327

种质及变温对羊草种子萌发的影响

杨伟光^{1,2,3*, *}, 刘盼盼^{1,2*, *}, 袁光孝^1,2, 毛培胜⁴, 齐冬梅¹, 董晓兵¹, 刘辉¹, 李晓霞^1,*, 刘公社^1,*

1.中国科学院植物研究所,北京 100093;
2.中国科学院大学,北京 100049;
3.黑龙江省畜牧研究所,黑龙江齐齐哈尔 161005;
4.中国农业大学草业科学系,北京 100193

收稿日期:2017-08-10 修回日期:2017-09-28 出版日期:2018-07-20 发布日期:2018-07-20
通讯作者: * E-mail: liugs@ibcas.ac.cn, lixx2013@ibcas.ac.cn
作者简介:杨伟光(1983-),男,内蒙古巴彦淖尔人,副研究员,在读博士。E-mail: anda580@163.com;刘盼盼(1990-),女,河南周口人,硕士。E-mail: a947148754@163.com.**共同第一作者These authors contributed equally to this work.
基金资助:
973项目“2014CB138704”资助

Effects of germplasm and changing temperature on seed germination of Leymus chinensis

YANG Wei-guang^1,2,3,**, LIU Pan-pan^1,2,**, YUAN Guang-xiao^1,2, MAO Pei-sheng⁴, QI Dong-mei¹, DONG Xiao-bing¹, LIU Hui¹, LI Xiao-xia^1,*, LIU Gong-she^1,*

1.Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China;
2.University of Chinese Academy of Sciences, Beijing 100049, China;
3.Institute of Animal Sciences in Heilongjiang Province, Qiqihar 161005, China;
4.Department of Grassland Science, China Agricultural University, Beijing 100193, China

Received:2017-08-10 Revised:2017-09-28 Online:2018-07-20 Published:2018-07-20
Contact: * E-mail: liugs@ibcas.ac.cn, lixx2013@ibcas.ac.cn

摘要/Abstract

摘要： 针对羊草种子萌发率低的问题,对43份不同种质的羊草种子,在两种变温条件下的萌发率进行了研究,并对恒温、变温、变温时长、变温时段对羊草种子萌发率的影响进行了测试。结果表明,羊草种子萌发率受种质影响较大,不同种质的羊草种子萌发率变幅为10%~95%,差异极显著。此外,羊草种子萌发亦受温度调控,恒温条件下(16、20、22、28、37 ℃)种子萌发率均较低,变温28 ℃(12 h)/16 ℃(12 h)则显著提高了种子萌发率,增幅为50%~90%。且变温处理对种子萌发有“时间剂量累加效应”,即变温处理时间越长,萌发率提高越大。在第1、2天时变温处理的种子萌发率与恒温对照相比,达到极显著差异,且在24 h内接收低温信号的剂量时长在2~16 h,高于16 h萌发率不随时间增加,低于2 h萌发率提高不显著。此外还发现,萌发24 h之内,羊草种子对变温处理有一个敏感的“窗口期”,即8~12 h,在这个时段内变温处理对种子萌发率提高最为显著。

关键词: 羊草, 种质, 种子萌发, 变温处理

Abstract: To clarify the reasons for low seed germination rate, germination of 43 different germplasm lines of sheep grass was studied at constant temperatures of 16, 20, 22, 28 and 37 ℃, and under a variable temperature regime of 28 ℃ (12 h) and 16 ℃ (12 h). It was found that seed germination percentage of sheep grass differed between germplasm lines, with values ranging from 10% to 95%. Seed germination was low under constant temperature conditions, while the alternating 28 ℃/16 ℃ treatment increased the seed germination rate by 50%-90% (P<0.01). Furthermore, the longer the daily high temperature exposure, the higher germination rate was. The seed germination rate was increased very significantly (P<0.01) on 1 day or 2 days of variable temperature treatment, compared with the constant temperature control. However, on the first day of germination, variable temperature less than 2 hours cannot significantly promotes germination, and germination rate improves significantly in 8-12 hours treatments, which considers as the “window period”.

Key words: sheep grass, germplasm, seed germination, variable temperature treatment

杨伟光, 刘盼盼, 袁光孝, 毛培胜, 齐冬梅, 董晓兵, 刘辉, 李晓霞, 刘公社. 种质及变温对羊草种子萌发的影响[J]. 草业学报, 2018, 27(7): 103-111.

YANG Wei-guang, LIU Pan-pan, YUAN Guang-xiao, MAO Pei-sheng, QI Dong-mei, DONG Xiao-bing, LIU Hui, LI Xiao-xia, LIU Gong-she. Effects of germplasm and changing temperature on seed germination of Leymus chinensis[J]. Acta Prataculturae Sinica, 2018, 27(7): 103-111.

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种质及变温对羊草种子萌发的影响

Effects of germplasm and changing temperature on seed germination of Leymus chinensis

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