【摘 要】
：
Because overexpression of Vitreoscilla hemo-globin gene(Vgb)gene in plants can enhance tolerance to waterlogging,here Vgb was inserted into Populus alba×glandu
【机 构】
：
State Key Laboratory of Tree Genetics and Breeding,Research Institute of Forestry,Chinese Academy of
论文部分内容阅读
Because overexpression of Vitreoscilla hemo-globin gene(Vgb)gene in plants can enhance tolerance to waterlogging,here Vgb was inserted into Populus alba×glandulosa to investigate its expression and effects on growth and physiological responses to waterlogging stress in the transgenic poplars.Southern blotting and RT-PCR analysis of Vgb-transgenic P.alba×glandulosa showed that the Vgb gene was integrated into the genome of the V13-81 and V13-85 transgenic lines and expressed.In greenhouse waterlogging stress tests,mortality of the transgenic poplar was significant lower than that of nontransgenic plants with increasing treatment time from 2 to 22 days.The transgenic plants had higher chlorophyll content and less chloroplast damage than in the control plants.Additionally,starch accumulation increased,and growth was enhanced in the transgenic plants,suggesting that the Vgb-expressing lines had improved energy reserves.Field trials of the transgenic poplar suggested that Vgb expression promotes growth and influences wood quality.Taken together,our results suggest that the expression of Vgb can increase the accumulation of chlorophyll and starch in the transgenic poplar,improve its ability to endure flooding,and improve growth and wood quality of the transgenic plants.
其他文献
Evidence-based selective cutting at prescribed intervals as part of good forest management can enhance the carbon sequestration capacity of the forest. The effe
恩施土家族苗族自治州州是全国最年轻的少数民族自治州。加快自治州建设,是中央领导和湖北省委、省政府的要求,也是恩施州近400万各族人民的热切期盼。本文提出采取5条措施,
百农307是河南科技学院以矮抗58为母本、06-4047为父本杂交,经过连续多年选育而成的高产、抗逆、广适的半冬性小麦新品种.2020年5月通过河南省农作物品种审定委员会审定,审定
The Brazilian state of Acre has an extensive natural reserve of bamboo,making it one of the largest in loco gene banks.The aim of this study was to characterize
摘 要：《义务教育语文课程标准》指出：“在发展语言能力的同时，要发展思维能力，激发想象力和创造潜能。”小学生的心理发展正处于想象力培养的黄金时期，因此学生的想象力十分重要。想象力是语文能力的重要组成部分。语文教学是沟通心灵的艺术，它不应只是机械地传授语文知识，而是让学生在阅读中发挥想象，促进学生更好地感悟语言，理解内容，体会课文表达的思想感情，提高阅读能力。因此，在教学实践中，教师应充分利用课堂主
皮亚杰指出:“所有智力方面的工作都依赖于兴趣。”数学学科的抽象性、概括性和逻辑性让很多学生感到枯燥乏味,要使学生在学习过程中体会到数学的生动有趣和无限魅力,强化数
The decay rate of standing Korean pine( Pinus koraiensis) in natural forests can be as high as 50% and is likely infl uenced by the soil properties and nutrient and water status of the site. To clarif
In terrestrial ecosystems,deep soils(below 30 cm)are major organic carbon(C)pools.The labile car-bon input could alter soil organic carbon(SOC)mineraliza-tion,r
The application of phosphorus(P)and a water-retaining polymer to the soil can increase the availability of P for Cordia trichotoma,having a positive effect on t
本文以大连电子学校电子产品制造教学工厂为例阐述了教学工厂的建设过程,分析了教学工厂的运行模式与校企合作创新机制,并在运行收益上做了一定的总结.