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Germination ecology of giant chickweed (Myosoton aquaticum)

Published online by Cambridge University Press:  14 July 2020

Hengzhi Wang ,
Lipeng Wang ,
Shuang Bai ,
Wenlei Guo ,
Jinxin Wang  and
Weitang Liu Open the ORCID record for Weitang Liu [Opens in a new window]
Hengzhi Wang
Affiliation:
Doctoral Student, Key Laboratory of Pesticide Toxicology and Application Technology, College of Plant Protection, Shandong Agricultural University, Tai’an, China
Lipeng Wang
Affiliation:
Graduate Student, Key Laboratory of Pesticide Toxicology and Application Technology, College of Plant Protection, Shandong Agricultural University, Tai’an, China
Shuang Bai
Affiliation:
Postdoctoral Student, College of Plant Health and Medicine, Qingdao Agricultural University, Qingdao, China
Wenlei Guo
Affiliation:
Postdoctoral Student, Plant Protection Research Institute, Guangdong Academy of Agricultural Sciences, Guangdong Provincial Key Laboratory of High Technology for Plant Protection, Guangzhou, China
Jinxin Wang
Affiliation:
Professor, Key Laboratory of Pesticide Toxicology and Application Technology, College of Plant Protection, Shandong Agricultural University, Tai’an, China
Weitang Liu*
Affiliation:
Associate Professor, Key Laboratory of Pesticide Toxicology and Application Technology, College of Plant Protection, Shandong Agricultural University, Tai’an, China
*
Author for correspondence: Weitang Liu, Key Laboratory of Pesticide Toxicology and Application Technique, College of Plant Protection, Shandong Agricultural University, Tai’an271018, Shandong, China. (Email: [email protected])
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Abstract

Giant chickweed [Myosoton aquaticum (L.) Moench], a troublesome broadleaf weed species, is widespread in winter wheat (Triticum aestivum L.) fields in China. However, limited information is available on its germination and seedling emergence ecology. Thus, three M. aquaticum populations (JS, HN, and AH) from different geographic regions were studied under laboratory conditions to determine the effects of different environmental factors on germination or seedling emergence. The seeds germinated at a relatively wide constant temperature range of 5 to 25 C; however, the optimal temperature for germination varied among the populations. Compared with constant temperatures, fluctuating temperatures with the same mean significantly improved the final germination of all populations. Light was not required for germination. The seeds germinated under a wide pH range of 3 to 10, and the optimum pH was 6 to 7, with a final germination percentage of 81% to 95%. The seeds of all populations showed similar sensitivities to osmotic potential and similar high tolerances of saline conditions. The seedling emergence of all populations decreased with increasing burial depth, and no emergence was observed when the seeds were buried more than 3 cm, but the AH population showed higher sensitivity to burial depth than the others. The results generated from this study will contribute to the development of integrated M. aquaticum management strategies for winter wheat fields in China, and deep plowing and late sowing of autumn-sown wheat are suggested for managing M. aquaticum, as it showed lower germination at a low temperature and under relatively deep burial.

Keywords

Burial depthlightosmotic potentialNaCl concentrationtemperature
Type
Research Article
Information
Weed Science , Volume 68 , Issue 6 , November 2020 , pp. 619 - 626
Copyright
© Weed Science Society of America, 2020

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Footnotes

Associate Editor: Bhagirath Chauhan, The University of Queensland

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