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Germination of Solanum nigrum L. (black nightshade) in response to different abiotic factors / Hongqiang Dong in Planta daninha, 38 (2020) 

Public Citation [article]  inPlanta daninha > 38 (2020) . - 1-12 Titre : Germination of Solanum nigrum L. (black nightshade) in response to different abiotic factors Type de document : Imprimé Auteurs : Hongqiang Dong ; Yan Ma ; Hanwen Wu ; Weili Jiang ; Xiaoyan Ma Année de publication : 2020 Article en page(s) : 1-12 Langues : Anglais (eng) Catégories : [CBNPMP-Thématique] Plantes subspontanées, naturalisées, envahissantes [CBNPMP-Thématique] Stratégie de conservation ex situ [CBNPMP-Thématique] Germination Mots-clés : Solanum nigrum L. Résumé : Solanum nigrum L. (black nightshade), an annual to short-lived perennial weed, has become a problem weed in farming systems in central China. Laboratory and greenhouse experiments were conducted to examine the influence of various abiotic factors on seed germination of black nightshade to develop effective weed control programs. Seeds germinated at a range of constant temperatures from 15 to 30 oC, but no germination occurred at temperatures below 10 oC or above 35 oC. Seeds also germinated at alternating temperature regimes from 15/5 to 40/30 oC, with maximum germination (> 93.5%) at the alternating temperatures of 25/15 and 30/20 oC. Germination decreased as osmotic potential became more negative, and no germination was observed at ≤ -0.8 MPa. Moreover, germination was reduced by saline and alkaline stresses and no germination occurred at ≥ 200 mM NaCl or ≥ 150 mM NaHCO3 concentrations. Seed germination was not significantly affected by pH values from 5 to 10. Seedling emergence was significantly affected by burial depth with maximum emergence (93.1%) at 1 cm depth. Lien pérenne : DOI : 10.1590/S0100-83582020380100049 Permalink : https://biblio.cbnpmp.fr/index.php?lvl=notice_display&id=154149 Dong, Hongqiang, Ma, Yan, Wu, Hanwen, Jiang, Weili, Ma, Xiaoyan 2020 Germination of Solanum nigrum L. (black nightshade) in response to different abiotic factors. Planta daninha, 38: 1-12.

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Seed Biology of Witchgrass (Panicum capillare L.) Ensures Its Success Under Different Environmental Conditions / Hanwen Wu in Frontiers in agronomy, 3 (2021) 

Public Citation [article]  inFrontiers in agronomy > 3 (2021) . - 657785 Titre : Seed Biology of Witchgrass (Panicum capillare L.) Ensures Its Success Under Different Environmental Conditions Type de document : Imprimé Auteurs : Hanwen Wu ; Md Asaduzzaman ; Adam Shephard ; Xiaoyan Ma Année de publication : 2021 Article en page(s) : 657785 Langues : Anglais (eng) Catégories : [CBNPMP-Thématique] Plantes subspontanées, naturalisées, envahissantes Mots-clés : Panicum capillare L. Résumé : Witchgrass (Panicum capillare L.) is a summer growing grass weed species and is increasing its prevalence in southern Australia. A better understanding of the seed biology is needed to effectively manage this weed. A series of field and laboratory studies were conducted to determine seed germination factors, field emergence patterns, and soil seedbank longevity. Witchgrass germination was stimulated by light and it germinated better at temperature over 20◦C, with 93–100% germination at the two constant temperatures of 20 and 30◦C, and the two alternating day/night temperatures of 30/25 and 35/25◦C. It is highly tolerant to moisture stress at germination, with 2–7% germination even at −0.48 Mpa. Witchgrass seed lost 47–68% viability after 12 months of burial in the soil, however the seed persisted for more than 4 years if buried at 10 cm in the soil. Witchgrass emergence in southern New South Wales (NSW) commenced inmid spring (early October), with peak emergence of 63–83%in November and then significantly reduced to 16–37% emergence in December. Little emergence (<1%) occurred in the summer months from January to February. These results provide useful information for designing effectivemanagement strategies and the optimum timing of control. Climate change could favor the phenological development and the further spread of this weed, which present new challenges for its effective management. Further study is needed to investigate the impact of climate change on the biology, spread, and management of witchgrass. Lien pérenne : DOI : 10.3389/fagro.2021.657785 Permalink : https://biblio.cbnpmp.fr/index.php?lvl=notice_display&id=153129 Wu, Hanwen, Asaduzzaman, Md, Shephard, Adam, Ma, Xiaoyan 2021 Seed Biology of Witchgrass (Panicum capillare L.) Ensures Its Success Under Different Environmental Conditions. Frontiers in agronomy, 3: 657785.

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