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Physiological Resilience of Bambara Groundnut (Vigna subterranea L. Verdc) Genotypes to Intermittent Periods of Drought Stress at Different Growth Stages

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Agricultural Sciences 2023年第11期14卷 1573-1592页

作者： Kennedy Agyeman Felix Frimpong Patricia Amankwaa-Yeboah Isaac osei-Bonsu Stephen Yeboah Agbesi Keteku Paul Marno Mavis Brempong Brempong Eric owusu Danquah Asamoah Emmanuel Adjei Michael Odenkey Quaye Joseph Nketiah Berchie CSIR-Crops Research Institute Fumesua-Kumasi Ghana Departnent of Agricultural Science Education University of Education Winneba Ghana

Different genotypes of Bambara groundnut (Vigna subterranea L. Verdc) grow well under conducive environmental conditions, provided that adequate soil moisture is available during vegetative and reproductive phases. However, drought stress is the major limiting factor to bambara production, which accounts for up to 40% of yield losses. This situation could worsen due to drastic and rapid changes in the global climate. Landraces grown by farmers are low-yielding. Understanding the physiological response of different genotypes to drought stress is key to achieving food security through crop improvement and diversification. This study focused on variations in the response of Bambara groundnut genotypes to intermittent drought stress during the crop’s critical growth (vegetative and reproductive) stages. The experiment was undertaken at CSIR-Crops Research Institute Screen-house. The treatments were used in a factorial experiment with three replications in a randomized complete block design. The Bambara genotypes showed considerable variability in tolerance to drought stress. Drought stress during vegetative and reproductive stages significantly reduced crop growth indices, the leaf relative water content, chlorophyll content and leaf area. Drought stress during vegetative and reproductive stages had a more severe impact on the seed yield of genotype Nav Red, reducing it by 69% and 13%, respectively. Farmers should pay more attention to adopting drought-tolerant and high-yielding varieties for improved Bambara groundnut productivity and livelihoods.

关键词： Drought Stress Bambara Groundnut Genotypes Seed Yield

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Does Environmental Laws and Policies Work?A Review Of Ghana’s Case

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Research in Ecology 2020年第3期2卷 32-41页

作者： Aboagye Emmanuel Mensah Attobrah Justice owusu Nana osei Fletcher Henrietta Zhongnan University of Economics and Law WuhanHubei430000China Ocean University of China QingdaoShandong266000China

Enforcing environmental laws and policies has been one of the pressing agenda *** the mandate given to the Environmental Protection Agency(EPA)by the Act 490,there are still numerous environmental issues unaddressed in *** paper is geared towards unravelling and identifying the current additions that have been made to existing literature on environmental laws and policies in *** paper made a wide-ranging general literature review to outline significant contributions concerning environmental laws and *** environmental laws and policies were identified but have been fragmented and are not codified in a particular *** is evident from the review of literature existing that there are still areas for advanced research on the topic of environmental laws and policies placing more emphasis on institution concerned with environmental issues at global *** study recommended the need for capacity building for environmental personnel and data due to the numerous technological advancement to better assist the implementation and enforcement of environmental laws in Ghana.

关键词： Environmental laws Environmental policies Environmental Protection Agency Law enforcement Act 490 Ghana

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Characteristics and mechanism of Leuconostoc citreum as a novel bioflocculant for starch granules in starch production

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Food Innovation and Advances 2023年第4期2卷 291-301页

作者： Xuan Wang Pamela owusu osei Lei Rao Xiaomeng Wu Xiaojun Liao College of Food Science and Nutritional Engineering National Engineering Research Center for Fruit&Vegetable ProcessingKey Laboratory of Fruit&Vegetable ProcessingMinistry of Agriculture and Agricultural AffairsBeijing Key Laboratory for Food Non-thermal ProcessingChina Agricultural UniversityBeijing 100083China

The Leuconostoc citreum SJ-57 strain isolated from the sweet potato starch production showed great potential as a microbiological flocculant,but its underlying flocculation mechanisms are yet *** this study,infrared spectroscopy and thermodynamic analysis were performed to elucidate the short-range and long-range interactions between *** SJ-57 and starch granules,revealing that bacteria cells bond starch granules via metal-bridging ionic bonds.A high repulsive energy barrier of~8×10^(−18)J must be overcome to initiate the flocculation ***,protease,lipase,lysozyme,dextranase,and guanidine hydrochloride were used to treat the bacterial cell,confirming that its flocculation ability originated from surface proteins,including GW structural domain proteins,DnaK,GroEL,elongation factor Tu,and lysozyme *** primary flocculation mechanisms of *** was proposed to provide a deep understanding of microbiological flocculants and a foundation for future industrial applications in starch production.

关键词： starch overcome originated

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Physiological Resilience of Bambara Groundnut (Vigna subterranea L. Verdc) Genotypes to Intermittent Periods of Drought Stress at Different Growth Stages

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Agricultural Sciences（农业科学） 2023年第11期

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