Ecological role of physical dormancy in seeds of Oxytropis racemosa in a semiarid sandland with unpredictable rainfall

Hu, Dandan; Baskin, Jerry M.; Baskin, Carol C.; Yang, Xuejun; Huang, Zhenying

doi:10.1093/jpe/rtx063

Cited by 13 publications

(7 citation statements)

References 36 publications

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“…Several studies have sought to improve the seedling production process by analyzing the methods of overcoming dormancy and increasing and homogenizing the percentage of seedling germination (Leperlier et al, 2018;Lopes & Souza, 2008). Among the methods that break the seeds physical dormancy, mechanical scarification represents one of the most frequently used methods because it is a practical, safe and low-cost technique (Hu, Baskin, Baskin, Yang, & Huang, 2017). Despite the high number of studies on the effectiveness of methods for overcoming dormancy in germination (Varela & Lizardo, 2010;Scalon et al, 2005;Alexandre, Gonçalves, Rocha, Arruda, & Lemes, 2009;Lessa, De almeida, Pinheiro, Nogueira, & Medeiros Filho, 2014), most of these studies have not provided practical information to facilitate the selection of the most appropriate methods based on their costs and benefits.…”

Section: Introductionmentioning

confidence: 99%

Methods for overcoming dormancy and seed storage of <i>Enterolobium contortisiliquum

2019

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The production of forest species that present seedlings with exogenous dormancy is limited by low germination rates, which can be overcome by rupturing or weakening the tegument. This study aimed to evaluate the efficiency of low-cost methods of overcoming dormancy and determine the effect of storage on the seeds of Enterolobium contortisiliquum. Four storage periods were used, freshly collected seeds (0), stored for 6, 12 and 18 months, and four methods were applied, mechanical scarification and immersion in water (EI), mechanical scarification (ES), immersion in water (IM) and control (TE). We obtained the percentage values of seedling emergence (EP) and the mean emergence time (TME). Conductivity and moisture were obtained as indicators of the physical and physiological quality of seeds, respectively. Variations in moisture content and electrical conductivity during storage did not have effect on the percentage of germination. EI treatment was more efficient for overcoming dormancy than the ES was, regardless of storage time. IM and TE treatments did not lead to germination. EI was the most efficient treatment for decreasing the TME. The results indicate that alternative and low-cost methods are efficient at overcoming exogenous dormancy and thus can be used to optimize the process of seedling production.

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Section: Introductionmentioning

confidence: 99%

Methods for overcoming dormancy and seed storage of <i>Enterolobium contortisiliquum

2019

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“…In addition, seed dormancy is a critical strategy to establishment and plant success, especially for ruderal or stress tolerant plant species. In south Texas and other arid regions, moisture is a limiting factor, and thus one of the major environmental factors in breaking seed dormancy [25]. Our germination results show that seed presoaking is associated with the highest seed germination rates in half of the selected plant species.…”

Section: Discussionmentioning

confidence: 64%

Pre-Sowing Treatments Improve Germinability of South Texas Native Plant Seeds

Lavallee

Soti

Rodrigo

et al. 2021

Plants

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The incorporation of native plant species is central to restoration efforts, but this is often limited by both the availability of seeds and the relatively low viability and germination rates of commercially available seeds. Although pre-sowing treatments are commonly used to improve germination rates of seeds, the efficacy of these treatments is found to vary across species. In this study, we tested how four pre-sow treatments (physical scarification, acid scarification, cold stratification, and aerated hydropriming) affected the viability and seed germination rates of 12 commercially available plant species native to south Texas and commonly used in restoration efforts. Our results show that the viability of the seeds have a wide range, from 78% to 1.25%. Similarly, the total germination rate ranged from 62% to 0%. We found that pre-sowing treatments accelerated the germination rate in 9 of 12 plant species tested, but the effect varied by treatment. Collectively, our results identify various methods to achieve the best germination rates for native plants of south Texas, to help improve restoration efforts across the region.

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“…Nijhumdwip is the highest vulnerable to unpredicted rainfall. Unpredicted rainfall is harmful for the seed germination, pathogen infestation and pollinations in agricultural crops [13].…”

Section: Resultsmentioning

confidence: 99%

Factors Affecting Agriculture in Response to Climate Change in Bangladesh

Khayer¹,

Eti²,

Hasan³

et al. 2019

Preprint

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An opinion dependent cross sectional survey was conducted among charland peoples of Noakhali, Bangladesh with a view to identify the factors that affect green economy. Nijhumdwip Island and Tamaruddi union are highly affected by cyclone and soil salinity. Unpredictable rainfall is the most acute in Nijhumdwip. Lack of information the main problem in Nijhumdwip Island. Farmers are found less interest in integrated farming and crop diversification. Few farmers from Sonadia Union are involved in homestead gardening. Regression analysis have shown a negative relationship (p<0.001) between education of stockholders and decrease of crop production. On the other hand education level of stockholders is to be found positively (p<0.05) varied with decrease of food insecurity. So it can be said that educated farmers are more adaptive against climate change.

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Ecological role of physical dormancy in seeds of Oxytropis racemosa in a semiarid sandland with unpredictable rainfall

Cited by 13 publications

References 36 publications

Methods for overcoming dormancy and seed storage of <i>Enterolobium contortisiliquum

Methods for overcoming dormancy and seed storage of <i>Enterolobium contortisiliquum

Pre-Sowing Treatments Improve Germinability of South Texas Native Plant Seeds

Factors Affecting Agriculture in Response to Climate Change in Bangladesh

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