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Laura Chalupowicz Michal Reuven Orit Dror Noa Sela Saul Burdman Shulamit Manulis-Sasson 《Plant pathology》2020,69(9):1787-1797
Acidovorax citrulli is the causal agent of bacterial fruit blotch disease of cucurbits. Strains of this pathogen are distributed into two major groups: Group I strains have been mainly isolated from melon and other non-watermelon cucurbits, while Group II strains have been mainly recovered from watermelon. Here we report the characterization of strains T1 and EP isolated from diseased tomato and eggplant plants, respectively, and further confirmed to belong to A. citrulli species. Based on PCR, PFGE, and rep-PCR, these strains showed high similarity to the Group II strain 7a1. Sequencing and comparative analyses revealed that the genomes of T1 and EP aligned with that of the Group II model strain AAC00-1, over 97.88% and 99.22%, respectively. The virulence of T1, EP, and 7a1 determined on tomato, eggplant, and watermelon was similar and significantly higher than that of Group I strain M6. In contrast, M6 was more virulent on melon. Expression levels of seven virulence genes measured 24 hr after inoculation of tomato, eggplant, watermelon, and melon showed that the expression pattern was generally similar in strains 7a1, T1, and EP, whereas for M6 the expression was high only on melon. Overall, our results indicate that the solanaceous strains belong to Group II. To the best of our knowledge, this is the first study that reports characterization of A. citrulli strains isolated from solanaceous species. The fact that A. citrulli is able to naturally colonize and cause disease in non-cucurbit crops poses additional challenges for management of this important pathogen. 相似文献
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Nnadi Onyinyechi Ifeanyi 《Journal Of Agricultural & Food Information》2019,20(1):71-85
This study examined the use of Information and Communication Technologies (ICTs) for agricultural teaching and research in universities in Enugu State, Nigeria. Results show that almost all the respondents (lecturers 96.9%, students 90%) had acquired ICT training. Computers, GSM/telephone, photocopying machines, e-mail, flash drives, printers and Internet were the most frequently used ICTs. The age of the lecturers was the most important factor that significantly influenced the frequency of computer usage for teaching and research (P ≤ 0.05). 相似文献
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蔬菜是人们日常生活中不可缺少的副食品,蔬菜产业在国民经济中占有重要地位。20世纪50年代特别是改革开放以来,中国的蔬菜产业实现了快速发展,在产值、出口量等方面均位居农作物首位,已成为中国农民增收、农村发展的支柱产业,这其中离不开蔬菜育种科学技术的快速发展和强力支撑。当前,中国蔬菜产业正面临实现转型升级的关键时刻,继续大力发展蔬菜育种科学技术、推进科技创新、促进种业发展是其必由之路。本文回顾了中国蔬菜育种科学技术的发展历程,总结了20世纪50年代以来中国蔬菜育种取得的成绩,如不断壮大的科研队伍和取得的一批重要科研成果,以及迅速发展的种业企业等;文章还对中国蔬菜育种科学技术的未来进行了展望,根据中国蔬菜育种目前存在问题及市场的需求,提出了今后应重点做好的工作,包括建立新型蔬菜育种技术体系、加强基础研究和应用基础研究、做好种质创新工作、规范蔬菜种业市场和保护育种者的知识产权等等。 相似文献
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介绍了淄博市大力推广秸秆综合利用的几种模式,主要包括:秸秆深耕还田、秸秆反应堆、秸秆养藕、沼气利用等技术,对全市的秸秆综合利用工作有一定程度的推动作用。 相似文献
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马尾松是福建省广泛分布的树种之一,在福建地区的工业利用价值极高。近年来,马尾松的用材需求与日俱增,如何快速、高效、低成本的培育苗木,满足市场的需求,已经成为广大林业工作者需要考虑的问题。笔者针对当前福建地区马尾松的基本情况,提出在福建地区推广快速育苗的方法,供实践借鉴。 相似文献
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Zahra Meghani 《Agriculture and Human Values》2008,25(1):25-34
The aim of this paper is to make possible dialogue between those who claim that technologies are coded with social, political,
or ethical values and those who argue that they are value-neutral. To demonstrate the relevance of this bridge-building project,
the controversy regarding agrifood biotechnology will be used as a case study. Drawing on work by L. H. Nelson about the nature
of human knowledge-building enterprises and E. F. Kittay’s account of the relationally-constituted self, the argument will
be made that all technologies embody the values of the communities that created them.
Zahra Meghani is an assistant professor in the Department of Philosophy at the University of Rhode Island. Her research interests are philosophy
of technology, feminist theory (especially feminist epistemology and feminist philosophy of science), normative ethics, practical
ethics (especially health care ethics), disability issues, and political theory. 相似文献