|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | Comparative QTL analysis of maize seed artificial aging between an immortalized F_2 population and its corresponding RILs显示文摘Seed aging decreases the quality and vigor of crop seeds,thereby causing substantial agricultural and economic losses in crops.To identify genetic differences in seed aging between homozygotes and heterozygotes in maize,the seeds of a set of recombinant inbred lines(RILs) and an immortalized F_2(IF_2) population were subjected to artificial aging treatments for 0,2,3,and 4 days under 45℃ and 85%relative humidity and seed vigor was then evaluated in a field experiment.Seed vigor of all entries tested decreased sharply with longer aging treatment and seed vigor decreased more slowly in heterozygotes than in homozygotes.Forty-nine QTL were detected for four measured seed vigor traits in the RIL(28QTL) and IF_2(21 QTL) populations.Only one QTL,qGP5,was detected in both populations,indicating that the genes involved in anti-aging mechanisms differed between inbred lines and hybrids.Several QTL were identified to be responsible for multiple seed vigor traits simultaneously in the RIL and IF_2 populations under artificial aging conditions.These QTL may include major genes for seed vigor or seed aging.QTL qVI4 b and qGE3 a detected in the RIL population coincided with genes ZmLOX1 and ZmPLD1 in the same respective chromosomal regions.These QTL would be useful for screening for anti-aging genes in maize breeding. | Bin Wang Zhanhui Zhang Zhiyuan Fu Zonghua Liu Yanmin Hu Jihua Tang | 2016 | The Crop Journal2016，4，1： | 5 |
| 2 | Performance of Iranian Okra Ecotypes Under Various Accelerated Aging Conditions显示文摘Knowledge of seed quality and preservation of okra seeds is very limited, and the main purpose of this study was to simulate the condition of seed quality loss during storage and the physiological implications, which has led to seed vigor loss. A factorial experiment was conducted with the aim of studying the mechanism of longevity loss of the three endemic okra ecotypes of Iran(Ahwaz, Isfahan, Mashhad) in response to different accelerated aging durations(24, 48, 96, and 192 h). The accelerated aging condition was incubation of seeds to the temperature of 40 °C with 99% humidity. Germination of okra seeds was improved at 24 and 48 h compared to non-aged seeds, while at 192 h of accelerated aging, seed germination(49%) reduced to 50% of its value in 48 h(96.4%). Our results revealed that Iranian okra ecotypes were able to survive accelerated aging conditions up to 48 h. Antioxidant enzyme activity decreased with the increase in aging durations. Among investigated cultivars, seedling vigor of Mashhad ecotypes was the most sensitive to aging treatments. Our results revealed that the seed reservoir use efficiency value was 66%lower when exposed to 192 h of aging compared to the control. The cultivar Isfahan exhibited the minimum reduction of antioxidant activity,and, interestingly, this ecotype was the most aging tolerant. | Ghasem Parmoon Seyed Amir Moosavi Seyed Ataollah Siadat | 2019 | Horticultural Plant Journal2019，5，1： | 0 |
| 3 | Effects of Different Storage Conditions on Physiological and Biochemical Characteristics of Polygala tenuifolia Willd. Seeds显示文摘[Objectives] Taking Polygala tenuifolia Willd. seeds as experimental material, the changes of physiological and biochemical characteristics of seeds under different storage temperatures and seed moisture contents were studied. [Methods] The seeds of P. tenuifolia Willd. with moisture contents of 3%, 5% and 15% were stored at-10 ℃, 0 ℃, 20 ℃ and 36 ℃, respectively, and the storage time was one year. The physiological and biochemical characteristics of the seeds, such as conductivity, SOD activity, POD activity, and soluble sugar content were studied.[Results] After one-year storage, as the storage temperature and seed moisture content increased, the relative conductivity, MDA content and soluble sugar content of P. tenuifolia Willd. seeds increased, while the SOD activity, POD activity, and protein content declined. This phenomenon was most obvious in the P. tenuifolia Willd. seeds with moisture content of 15%. [Conclusions] This study will provide reference for seed storage of medicinal plants. | Zhaoying ZHANG Yanan ZHANG Lili SONG Jun WANG Shuying QIN Wenquan WANG | 2019 | Medicinal Plant2019，10，2： | 0 |
| 4 | Physiological Maturity of Corn Seeds(Zea mays)by Tetrazolium Salt显示文摘The purpose of this study was to evaluate the relationship of tetrazolium salt testing to common indicators(milk line,black layer,dry matter)used to determine corn seed physiological maturity.The seeds used were the hybrids Pioneer 4285 and Dow 2B587.These hybrids were harvested 40 days after polinization(DAP),with 4-day intervals until 68 DAP.The harvested seeds were evaluated for viability and vigor(germination test,accelerated aging test and cold test).The parameters used to determine the physiological seed’s maturity were the black layer,the milk line,the seed dry matter,seed water content and the evaluation of seed tissues using the tetrazolium salt to evaluate the endosperm cells.The germination of both materials was greater than 95%and there was no difference between harvest times.Corn seed physiological maturity(PM)was identified at 56 DAP for P4285(F2)and between 48 and 56 DAP for 2B587(F2).The maximum vigor was detected by accelerated aging tests and cold tests before PM for the two genotypes.The activity of endosperm cells is related to the other PM indicators(milk line,black layer,dry matter and water content).The transport of nutrients from plant to the seed ceases at seed physiological maturity.Use of tetrazolium salt allows identifying cell death of the basal region and this parameter corresponds to the others evaluated,thus demonstrating that the tetrazolium salt is effective for corn seed physiological maturity characterization. | Luiz Felipe Nicoleti Torrezan Ana Dionisia da Luz Coelho Novembre | 2018 | Journal of Food Science and Engineering2018，8，6： | 0 |
| 5 | THE MECHANISM OF SEED DETERIORATION显示文摘Seed deterioration is an irresistible physiological phenomenon.The aim to studyseed deterioration is to see if seed deterioration can be retarded artificially and the higher seedvigor of fine varieties be maintained.The change of seed deterioration occurs in almost every sys-tem,and affects many kinds of enzyme and almost all organelle,as a result,the seed loses its vig-or.The reason of seed deterioration and the lost of seed vigor are mainly studied and discussed inthis paper.According to the external and internal two kinds of theory advanced by E.H.Roberts,Much deep discussions are made from the view of biochemistry. | Liu Enju Feng Yulong Sun Hongzhi Northeast Forestry University | 1993 | Journal of Northeast Forestry University1993，4，1： | 0 |
您所在的机构暂未开通此部分的功能，请联系管理员