检索结果-南通市图书馆

The Dynamic Changes in cold tolerance of Ground-cover Chrysanthemum Growing in the Open Field during the Overwintering

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Agricultural Science & Technology 2015年第11期16卷 2399-2405,2436页

作者：景雄白永霞沈漫冷平生北京农学院植物科学技术学院北京102206 北京市农业应用新技术重点实验室北京102206 北京农学院园林学院北京102206

The ground-cover chrysanthemum （Dendranthemaxgrandiflorum Kitamura）＇Zixunzhang＇ was used as the experimental material in this study. The physiological and biochemical indexes of leaves, emergent rhizomes and roots from ＇Zixunzhang＇ growing in the open field during the autumn and winter in Beijing area were deter- mined. These indexes showed that root activities decreased slowly with the drop in temperature. The relative water contents of leaves and emergent rhizomes, and the water content of roots decreased. The activities of SOD, CAT and POD from leaves and emergent rhizomes were affected significantly by low temperature, but their change trends were different, which suggested that these 3 enzymes might play an interacted role in the formation of the cold tolerance of ＇Zixunzhang＇ mum, while the changes of the three enzyme activities in roots were little when the tem- perature dropped. With the significant increasing of the content of soluble sugar from leaves, the contents of soluble protein and proline declined overall; and the contents of osmotic regulation substances of emergent rhizomes and roots increased at first and then decreased. The correlation analysis indicated that the cold toler- ance of ground-cover mum ＇Zixunzhang＇ was related closely to relative water con- tents, SOD enzyme activity, soluble protein, soluble sugar and root activity. The morphological observation of leaves, emergent rhizomes and roots also showed that the survival of the ground-cover mum mainly depended on the cold tolerance of roots during the overwintering.

关键词： Ground-cover chrysanthemum Overwintering cold tolerance

Study on Change Laws of cold tolerance in Wheat under Drought Stress

在线全文

学校读者我要写书评

暂无评论

Agricultural Science & Technology 2016年第8期17卷 1862-1865,1932页

作者：曹文昕万映秀张琪琪李炎张平治安徽省农业科学院作物研究所安徽合肥230031 国家小麦改良中心合肥分中心安徽合肥230031

In order to study the change laws of cold tolerance in wheat under drought stress, 11 wheat varieties planted in Huang-Huai wheat area and one variety representative in middle-lower Yangtze River wheat area were selected, and the their change laws of cold tolerance under normal moisture condition and drought stress condition. The results showed that under drought condition, the cold tolerance of wheat in various growth stages was remarkably lower than that under nondrought condition, and the decreasing amplitudes were the largest in overwintering stage with an average of 4.91 ℃, the smallest in regreening stage, and in the middle in the jointing stage. Under non-drought condition, the cold tolerance of semi- winter varieties in various growth stages was better than that of spring varieties, there were significant differences between different varieties, and the cold tolerance of all varieties in overwintering stage was improved compared with before winter, and rapidly decreased after overwintering. Semiwinter varieties showed cold tolerance remarkably enhanced in overwintering stage, and the cold tolerance of spring varieties was also improved to a certain degree.

关键词： Wheat Drought stress cold tolerance

Study on Biological Characteristics and Pupa's cold tolerance of Liriomyza sativae on Florists cineraria

在线全文

学校读者我要写书评

暂无评论

Agricultural Science & Technology 2007年第3期8卷 29-32页

作者：刘军和禹明甫贺达汉宁夏大学农学院宁夏银川750021 黄淮学院河南驻马店463000

In this study, Liriomyza sativaes was raised on Florist cinerarias in greenhouse with different temperatures at 15, 20, 25, 30 and 35 ℃, and their corresponding development duration of entire generation were 47.0, 25.0, 15.5, 12.5 and 12.0 d. The beginning growth temperatures of egg, larva, pupa and entire generation of Liriomyza sativae were 8.5, 9.8, 10.2 and 10.4 ℃, and their effective accumulated temperatures were 52.7, 75.8, 158.5 and 262.2 d ·℃, respectively. Liriomyza sativae had 7 generations on Florist cinerarias in Ningxia each year. However, it occurred in the whole year in greenhouse. The length of its development duration in greenhouse decreased in order from cucumber, Callestephus chinensis, Florist cinerarias to pea, but the eclosion rate of its pupa was in the eentrary order. Under the temperature of 10, 0, - 15 and 20 ℃ ,the longer the storage of pupa was,the higher the mortality rate would be. Liriomyza sativae couldn＇t survive in the winter in Ningxia Province in the natural environment.

关键词： Florist cinerarias Liriomyza sativae Development duration cold tolerance Survival rate

Identification of cold tolerance of Rice Germplasm Resource at Germinating Stage in cold Region

在线全文

学校读者我要写书评

暂无评论

Journal of Northeast Agricultural University(English Edition) 2008年第2期15卷 1-4页

作者： LIU Hualong SUN Shiche WANG Jingguo ZOU Detang College of Agriclture Northeast Agricultural University Harbin 150030 China Heilongjiang Academy of Agricultural Sciences Harbin 150086 China

Total 75 rice varieties （lines） in Heilongjiang Province （or cold region） as germplasm resources were identified for cold tolerance at germinating stage by controlling temperature in artificial incubator. The results showed that the shooting seed rate at the germinating stage could be used as the evaluation index of cold tolerance. The cold tolerance was recorded on 1-9 scale and could be identified by the criteria of five indexes such as highly tolerant （HT）, tolerant （T）, moderately tolerant （MT）, susceptible （S）, highly susceptible （HS）.

关键词： rice cold tolerance germplasm resource identification

Evaluation of cold tolerance in Wild Sugarcane Germplasm Resources under Field Conditions

在线全文

学校读者我要写书评

暂无评论

Agricultural Biotechnology 2017年第2期6卷 22-25,30页

作者： Sujie LI Xianhong WANG Qinghui YANG Sugarcane Research Institute Yunnan Agricultural University

In January 2016, Kunming underwem 52 hours of rain and snow weather below 0℃. in order to identify the cold tolerance of different wild sugarcane germplasm resources in low temperature and snow disasters, cold injuries of 38 shares of wild sugareane germplasm resources, which were oollected during 2012 -2013 and preserved in the germplasm resource nursery of Sugarcane Research Institute, Yumlan Agricultural University, were surveyed to evaluate the cold tolerance based on sugarcanc cold tolerance index （CTI） = 0.5 x shoot tip growing point injury index ＋ O. 3 x node injury index ＋ 0.2X internode injury in- dex. The results showed that cold tolerance indexes of four wild sugarcane varieties demonstrated a descending order of Erianthus arundinaceum Retz. （0.7）, Eri- aTrthus rockii Keng （0.5） , Sacchartun sporrtanettm L. （0.3） , Erianlhus fulvus Ne^s. （0）. Greater cold tolerance indexes indicate poorer cold tolerance. Thus, Erianthu, arundinaceum had the poorest cold tolerance, while Erianthus fulvus exhibited the strongest cold tolerance. In addition, there were significant differences in cold tolerance among diffcrent Saccharum spontaneum clones. The 23 Saccharum spontaneum clones could be divided into four grades, including 1 clone with the poorest cold tolerance that accounted for 4.3%, 5 clones with poor cold tolerance that accounted for 21.7%, 14 clones with strong cold tolerance that accounted tot 60.9%, and 3 clones with the strongest cold tolerance that accounted for 13.0% （2012 -23, 2012 -32, 2012 -37）. Especially, 2012 -23 exhibited extremely strong cold tolerance. This study provided the scientific basis for screening of cold-tolerant wild sugarcane germplasm resources and selection of cold-toleranl parents.

关键词： Wild sugarcane germplasm resources Low temperature disaster cold tolerance

A Preliminary Study on cold tolerance in Cinnamomum japonicum Sieb. at Different Ages

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Agricultural Biotechnology 2013年第6期2卷 24-28页

作者： Dongqin ZHOU Yuwu XIONG Zhiguo LU Luwan HAN Ziyang WANG Yunlong YIN Institute of Botany Jiangsu Province and Chinese Academy of Sciences Nanjing Zhongshan Botanical Garden

[ Objective] This study aimed to further expand the production and application of Cirmamomumjaponicum Sieb. and investigate the mechanism of cold resistance in evergreen broad-leaved tree species. [ Method] Using adult Cinnamonum campora as control, during the entire wintering period from October 2011 to March 2012, the wintering adaptability of C. japonicum leaves at different ages was observed; the electrolyte leakage was measured under indoor low-temperature treatment to calculate the semi-lethal temperature （LT50） by fitting Logistic equation, thus conducting dynamic analysis and comprehensive evaluation of the cold re- sistance in C. japonicum. [ Result] The results showed that the chilling injuries in leaves of different materials were aggravated with the decreasing temperature. According to the results of five times of dynamic observation on wintering adaptability, the cold resistance in different materials presented a decreasing order of adult C. japonicum medium-aged C. japonicum 〉 young C. japon/cum 〉 adult C. campora. The relationship between indoor low temperature and leaf injury rate showed an S-shaped curve. The significance test suggested relatively high fitting degree with Logistic equation. The semi-lethal temperature presented a V-shaped curve with the changing temperature and roached the minimum during late December to early February in the following year. The dynamic changes and minimum value of semi-lethal temperature indicated a consistent order of cold resistance in different materials to the results of wintering adaptability observation. Therefore, results of two analysis methods could be combined for cold resistance evaluation. [ Conclusion] This study laid the foundation for the introduction and populariza- tion of C. japonicum in northern gardens along the Yangtze River.

关键词： Cinnamomumjaponicum Sieb. cold tolerance LT50 Evergreen broad-leaved trees

Evaluation of cold tolerance of Sugarcane under Drought Frost Condition

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Agricultural Science & Technology 2011年第9期12卷 1303-1307页

作者：杨荣仲李杨瑞王维赞朱秋珍周会唐仕云罗亚伟中国农业科学院甘蔗研究中心广西南宁530007 广西甘蔗研究所广西南宁530007 农业部甘蔗品质监督检验测试中心(南宁) 广西南宁530007

[Objective]The aim was to understand the change characteristics of sugarcane traits and evaluate the cold tolerance of sugarcane varieties under the drought and frost conditions.[Method] The experiment was carried out in Ziyuan County,Guangxi Province where the frost occurred often with 21 domestic and abroad sugarcane varieties（elites）.[Result] There were significant changes in the brix,green leaf number and photosynthetic rate of sugarcane before and after light frost and decreased more in cold-sensitive ***,the correlation was only significant between the damage rate of stem length and internode,percentage of green leaves after heavy frost in relation to sugarcane brix and brix changes after light *** analysis showed that the evaluation for cold tolerance of sugarcane would be more simple and reliable with traits of the damage rate of stem length and percentage of upper green *** evaluation for varieties indicated that if it was not carried out for cold-tolerance identification in breeding program,the percentage of sugarcane varieties with good cold-tolerance will be lower than30%,and higher than 60% with poor cold-tolerance in subtropical and tropical regions.[Conclusion] This study had provided theoretical basis for the cold-resistant evaluation of sugar cane and the breeding of the varieties of cold-resistant.

关键词： Sugarcane Drought frost cold tolerance Evaluation

Fine mapping of the qLOP2 and qPSR2-1 loci associated with cold tolerance of wild rice seedlings

在线全文

学校读者我要写书评

暂无评论

Fine mapping of the qLOP2 and qPSR2-1 loci associated with c...

Integration of cold tolerance and growth retardation in plants conferred by CbCBF from Capsella bursa-pastoris

江苏省遗传学会2014年学术研讨会

作者： Weinan Huang Ning Xiao Yong Gao Zhengyuan Dai Jianmin Chen Yangzhou University

cold tolerance at the seedling stage(CTS) is an important trait affecting rice production in temperate climates and high-altitude *** identify quantitative trait loci(QTLs) associated with CTS,a preliminary mapping group consisting of 151 BC2 F1 plants was constructed with cold-tolerant Dongxiang wild rice(Oryza rufipogon Griff.) as a donor parent and cold-sensitive indica as a recurrent *** 130 codominant polymorphic simple sequence repeat markers,two major QTLs associated with leaf osmotic potential(LOP) and plant survival rate(PSR) were detected together near RM318 on the long arm of chromosome 2 by composite interval *** two QTLs,qLOP2(LOD = 3.79) and qPSR2-1(LOD = 3.3),accounted for 10.1% and 12.3%,respectively,of the phenotypic *** fine-map these QTLs,a large segregating population of 11,326 BCF backcross introgression lines was *** on phenotypes/genotypes of the advanced backcross progenies,qLOP2 and qPSR2-1 were dissected as a single QTL factor and fine-mapped to a 39.3-kb candidate region defined by markers RM221 and *** and sequence analysis results confirmed Os02 g0677300 as a cold inducible gene for *** belongs to CBF/DREB *** the plant transgenic technology,rice cold resistant phenotype received a significant *** study provides novel alleles that improve rice cold tolerance by marker-assisted selection and contributes to the understanding of molecular mechanisms related to cold tolerance in rice.

关键词： cold tolerance wild rice QTL seedlings stage CBF/DREB1s

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

Integration of cold tolerance and growth retardation in plan...