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中国农学通报

中国农学通报 ›› 2023, Vol. 39 ›› Issue (9): 40-44.doi: 10.11924/j.issn.1000-6850.casb2022-0662

• 林学·园艺·园林 • 上一篇    下一篇

外源激素对沙米(Agriophyllum squarrosum)种子萌发的影响

张忠1,2,3(), 马全林1,2,3, 张德魁1,2,3, 魏林源1,2,3, 陈芳1,2,3, 戚福俊1,2,3   

  1. 1 甘肃省治沙研究所，兰州 730070
    2 甘肃省荒漠化与风沙灾害防治国家重点实验室（培育基地），甘肃武威 733000
    3 甘肃民勤荒漠草地生态系统国家野外科学观测研究站，甘肃民勤 733300
  • 收稿日期:2022-08-28 修回日期:2022-11-27 出版日期:2023-03-25 发布日期:2023-03-23
  • 作者简介:

    张忠，男，1979年出生，甘肃张掖人，本科，主要从事荒漠化防治研究。通信地址：730070 甘肃省兰州市安宁区北滨河西路390号 甘肃省治沙研究所，Tel：0931-7686822，E-mail：。

  • 基金资助:
    甘肃省林业和草原科技创新项目“沙生经济植物沙米良种选育与产业化关键技术创新”(kjcx2021002); 甘肃省自然科学基金项目“固沙先锋植物沙米对风沙流胁迫的抗逆性及响应机制”(20JR10RA466); 甘肃省林业自列项目“沙生经济植物沙米优良品系的筛选”(2019kj124); 中央财政林业示范推广项目“古浪县腾格里沙漠南缘植被群落及结构快速恢复与改造提升技术示范推广”([2021]ZYTG002)

Effects of Exogenous Hormone on Seed Germination of Agriophyllum squarrosum

ZHANG Zhong1,2,3(), MA Quanlin1,2,3, ZHANG Dekui1,2,3, WEI Linyuan1,2,3, CHEN Fang1,2,3, QI Fujun1,2,3   

  1. 1 Gansu Desert Control Research Institute, Lanzhou 730070
    2 State Key Laboratory Breeding Base of Desertification and Aeolian Sand Disaster Combating, Wuwei, Gansu 733000
    3 Gansu Minqin National Studies Station for Desert Steppe Ecosystem, Minqin, Gansu 733300
  • Received:2022-08-28 Revised:2022-11-27 Online:2023-03-25 Published:2023-03-23

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摘要：

为了筛选促进沙米种子萌发的最佳外源激素处理方法，用不同浓度的赤霉素(GA3、GA4+7)和ABA合成抑制剂氟啶酮(FL)进行浸种实验，分析外源激素浸种浓度和浸种时间对沙米种子萌发的影响。结果表明：（1）浓度为1.6 g/L GA3、0.4 g/L GA4+7和5.0 μmol/L FL浸种效果最好，发芽率分别为93%、82%和100%，总体效果FL> GA3> GA4+7。（2）在适宜浓度下，0~24 h浸种时间内沙米种子的发芽率均随着外源激素浸种时间的延长呈增加趋势，浸种24 h发芽率最高。（3）在相同浸种时间下，FL浸种萌发率均高于GA3和GA4+7，FL能更快破除种子休眠，促使种子快速萌发。总之，外源激素浸种不仅能提高沙米的萌发率，也极大地缩短了沙米种子的萌发进程。

关键词: 沙米, GA3, GA4+7, 氟啶酮(FL), 浸种浓度, 浸种时间, 种子萌发

Abstract:

In order to screen out the best exogenous hormone treatment to promote the germination of Agriophyllum squarrosum, different concentrations of gibberellin (GA3, GA4+7) and ABA synthesis inhibitor fluridone (FL) were used to conduct seed soaking experiments. The effects of soaking concentration and soaking time on the germination of Agriophyllum squarrosum were studied. The results showed that: (1) the germination of Agriophyllum squarrosum was better after being soaked by 1.6 g/L GA3, 0.4 g/L GA4+7 and 5.0 μmol/L FL, the germination rate was 93%, 82% and 100%, respectively, and the overall effect was FL>GA3>GA4+7; (2) at the optimum concentration, the germination rate of Agriophyllum squarrosum increased with the prolonging of the seed soaking in exogenous hormones within the soaking time of 0-24 h, and the germination rate was the highest at the soaking time of 24 h; (3) under the same seed soaking time, the germination rate under FL was higher than that under GA3 and GA4+7, and FL could break seed dormancy faster and promote rapid seed germination. In short, soaking seeds with exogenous hormones can not only improve the germination rate of Agriophyllum squarrosum, but also greatly shorten the germination process.

Key words: Agriophyllum squarrosum, GA3, GA4+7, fluridone (FL), seed soaking concentration, seed soaking time, seed germination