共查询到20条相似文献，搜索用时 187 毫秒
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通过室内砂培试验,研究低温逆境下氯化胆碱包衣玉米种子对其萌发及幼苗生理生化指标的影响。结果表明,低温逆境下氯化胆碱包衣能显著提高种子发芽率、发芽指数和活力指数,并提高种子发芽势;包衣处理明显提高低温逆境下玉米幼苗的苗高、根长、茎粗、根冠比和单株干重,具有良好的壮苗作用;低温逆境下包衣处理的幼苗叶片叶绿素含量和脯氨酸含量均高于对照,丙二醛含量和相对电导率低于对照。 相似文献
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为了研究不同浓度曲酸（Kojic acid）对甜菜种子引发效果,为甜菜种子包衣剂物料筛选提供依据。以‘TD801’甜菜种子为试验材料,设置曲酸100、300、500 mg/L三种不同浓度和8、16、24 h三个时间梯度共9个处理（未引发干种子为对照）,对甜菜种子进行浸泡、回干发芽培养试验,测定其发芽势、发芽率、发芽指数、活力指数以及相对电导率。结果表明,9个处理在提高甜菜种子发芽势、发芽率、发芽指数、活力指数等方面,均有明显效果。经过处理的甜菜种子,其发芽势比对照提高5.67～10.67个百分点;发芽率比对照提高5.66～9.33个百分点;发芽指数比对照提高30.67%～64.45%;活力指数比对照提高33.13%～99.02%;相对电导率相比对照降低126.50～145.70个百分点。浓度为500 mg/L,时间为16 h对发芽势和发芽率效果最好;浓度为300 mg/L,时间为24 h对发芽指数和活力指数效果最好;浓度为100 mg/L,时间为16 h对相对电导率效果最好。总体而言,浓度为500 mg/L,时间为16 h曲酸溶液对甜菜种子引发效果最好。 相似文献
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为筛选出耐老化春小麦品种,采用高温高湿(41℃,95%RH)人工老化法对33份新疆春小麦品种进行种子老化处理,分析了老化对春小麦种子发芽势、发芽率、发芽指数及活力指数的影响,以耐老化系数为基础,运用加权隶属函数和聚类分析法对参试品种的种子耐老化性进行了综合评价及分类。结果表明,品种间种子耐老化能力差异显著。与对照相比,种子发芽势和发芽率分别下降41.16和30.96个百分点,发芽指数和活力指数分别降低50.29%和64.77%,差异均达极显著水平。通过加权隶属函数和聚类分析,将33份材料划分为4种耐老化类型,其中新春6号、新春30号、新春40号、新春41号、新春43号、新春47号等6份品种种子耐老化能力突出,可以作为小麦耐老化育种的亲本。 相似文献
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中国玉米主产区栽培品种种子质量分析 总被引：2，自引：0，他引：2
以黄淮海、华北、西南三区46个玉米栽培品种种子为材料,通过物理化学指标测定、标准发芽及幼苗生长测定、逆境发芽测定、田间出苗率测定、指标间相关性分析、淀粉酶活力测定等对种子质量进行分析评鉴。结果表明,46个品种中马齿型和半马齿型的比例占80.4%。综合各项种子活力指标,排名前4位的高活力品种为先玉047、郑单958、大华玉2号和浚单26。玉米种子容重和总淀粉含量与平均田间出苗率分别呈极显著和显著正相关;发芽势、发芽率及逆境发芽各指标与平均田间出苗率均呈极显著正相关,其中抗冷测定发芽率的相关系数最高(r=0.881)。玉米种子容重和总淀粉含量是高活力玉米种子具备的典型性状,抗冷测定为玉米种子活力检测的最适方法;高活力玉米品种种子萌发中同一时期淀粉酶活力明显高于低活力玉米品种种子。 相似文献
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研究剥壳和切头对槟榔种子发芽的影响。结果表明,对槟榔种子进行剥壳和切头处理,其芽及根生长与对照的相比差异极显著,芽及根生长均明显比对照的好;其中切头处理的发芽势和发芽率最高,发芽指数和活力指数则以5/13剥壳处理的最高,且5/13剥壳处理的芽长平均值也最大;5/14剥壳处理的根长和根数的平均值均比对照的高。 相似文献
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为了测定不同浓度富里酸（FA）和腐植酸（HA）对甜菜种子的引发效果,为甜菜种子包衣剂物料的筛选提供依据。以不同浓度富里酸（FA）、腐植酸（HA）及两者组合为处理试剂,干种子为对照,通过对‘STm1616’甜菜种子浸泡回干发芽培养,测定其发芽势、发芽率、发芽指数和活力指数。结果表明,处理后甜菜种子的发芽势、发芽率、发芽指数和活力指数均得到了提高。与对照组相比,处理后种子的发芽势提高了3.34～10.34个百分点（平均6.96个百分点）,发芽势最高的0.0375%FA+0.0375%HA比最低的0.05%FA高出7.00个百分点;处理后种子的发芽率比对照组提高了4.33～11.33个百分点（平均8.74个百分点）,发芽率最高的0.0375%FA+0.0375%HA比最低的0.05%FA高出7.00个百分点;处理后的发芽指数比对照组提高了48.69%～142.89%（平均76.32%）,发芽指数最高的处理0.075%HA比最低的处理0.25%FA+0.025%HA高63.35%;处理后的活力指数提高了100.62%～254.59%（平均147.42%）,活力指数最高的0.075%HA比最低的... 相似文献
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研究了邻苯二甲酸二丁酯（DBP）对遵椒一号种子萌发的影响。结果表明：DBP的浓度低于0．015moL/L时不会对辣椒种子的萌发产生显著影响：浓度增到0．005mol/L时各处理与对照的胚芽长差异显著;DBP处理对胚根长起促进作用，对苗鲜重表现出DBP低浓度促进、高浓度抑制的规律;DBP处理的辣椒种子的发芽率与苗鲜重之间存在显著正相关．发芽指数与胚芽长之间也存在显著正相关．苗鲜重与其余各指标之间都存在正相关关系，而胚根长与发芽率、发芽指数和胚芽长之间存在负相关关系。 相似文献
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以高活力玉米自交系J002和低活力玉米自交系196为试验材料,采用TMT标记定量蛋白质组学技术,对不同活力玉米种子萌发期进行淹水胁迫72 h处理,比较蛋白质表达的差异。结果表明,共鉴定到203个差异蛋白,其中,上调蛋白169条,下调蛋白34条。通过对差异表达蛋白的功能富集分析和KEGG代谢通路富集分析发现,高活力种子在萌发过程中核糖体蛋白的合成量要高于低活力种子。在缺氧胁迫下,高活力种子的ROS清除剂如POD、SOD、APX等丰度均高于低活力种子。KEGG通路分析表明,高活力种子激活了糖酵解代谢、丙酮酸代谢等更多的代谢途径来获得能量。鉴定出一些丰度具有巨大差异的热激蛋白HSPs,由此可以推断,高活力种子具有更好抗性的分子机制。 相似文献
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以2个早籼稻品种的超干种子、干种子、鲜种子、湿种子、露白种子为材料,研究了高温处理对不同状态水稻种子发芽率的影响。结果表明,水稻不同种子状态耐受高温能力存在极显著差异,从强到弱依次为超干种子干种子鲜种子湿种子露白种子;水温对种子发芽率的影响比气温更显著;处理温度超过一定范围,发芽率随着温度升高和时间延长极显著下降;不同品种高温处理后的种子发芽率表现相同规律趋势,但也存在极显著个体差异;种子水分制约种子耐受高温能力,种子水分含量越高,耐受高温能力越弱。 相似文献
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Seed priming and drying condition effects were investigated immediately after seed-priming and 9 week after the storage. In this experiment, carrot seeds of 'Forto C.V.' were used. These seeds were individually primed for 10 days at 20 degrees C and in PEG (6000) (273 g L(-1)) and KNO3 (200 mmol) solutions. Then they were dried for 1 and 2 h at 15, 25 and 30 degrees C, respectively. One part of the seeds was stored at 5 degrees C in RH/45% For 9 week. Chemical priming effects, drying temperature as well as germination temperature on different traits especially germination percentage were significant. However, drying time had no significant effect on germination percentage after storage period. PEG priming and drying at 25 degrees C for 2 h provided the best condition for germination percentage. Using the best material for pre-priming, along with suitable drying management with appropriate quality and good conditions of the storage is important. 相似文献
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Deyong Zeng Jie Cui Yishu Yin Meng Zhang Shan Shan Xin Gao Yingchun Zhang Yeqing Sun Weihong Lu 《水稻科学》2020,27(5):423-433
As a unique form of abiotic stress, the environmental conditions of outer space are expected to induce changes in plant genomes, proteomes and metabolic pathways. However, the effect of outer space conditions on the overall physiology of plants at the protein level has yet to be reported. To investigate the effects of outer space conditions on the growth- and development-related physiological processes and metabolic pathways of rice different stages, the seeds of rice variety DN423 were sent into orbit for 12.5 d aboard the SJ-10 Returning Satellite, and then the seedlings of both treated and control rice were compared at the three-leaf stage (TLS) and tillering stage (TS). In addition to comparing plant growth and reactive oxygen species (ROS) levels, seedling proteomes were also compared using isobaric tags for relative and absolute quantitation (iTRAQ). Space flight increased TLS plant height by 20%, reduced and increased ROS levels of the TLS and TS seedlings, respectively, and affected the expression of 36 and 323 proteins in TLS and TS leaves, respectively. Furthermore, the functions of the differentially abundant proteins were mainly associated with metabolism, energy, and protein synthesis and degradation. These results suggested that the exposure of seeds to outer space conditions affects the subsequent abundance of key signaling proteins, gene expression, and the processes of protein synthesis and degradation, thereby affecting metabolic processes and promoting adaptation to the abiotic stress of outer space. As such, the present study sheds light on the effects of space flight on plants and contributes to a more comprehensive understanding of extraterrestrial biology. 相似文献
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Osmotic priming of true potato seed: Effects of seed age 总被引：1，自引：0，他引：1
N. Pallais 《Potato Research》1989,32(2):235-244
Summary The effects on germination and early seedling growth of presowing true potato seed in water or gibberellic acid (GA) at 1500
ppm and of priming in −1.0, −1.25 and −1.5 MPa solutions of KNO3+K3PO4 were studied using 30, 18, 6 and 3/4 month-old seed. The influence of light during presowing on the effectiveness of treatments
was also investigated.
Overall, priming in the light at −1.0 MPa was the most, and GA the least successful treatment for enhancing emergence and
subsequent seedling growth. Though GA increased final emergence from about 20 to 70% in the most recently harvested lot (3/4
mo), the rate and extent of final germination or emergence in this dormant seed was still much lower than that of the nondormant
lots (6–30 mo), especially when the latter were primed. For all lots, dry weight per seedling was 40% lower in dormant than
in nondormant seed, and 20% higher when seeds were primed at −1.0 MPa than when GA treated. In conclusion, the use of nondormant
seed may be a requirement for both effective priming and sowing of potato crops via true seed. 相似文献
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为鉴定与水稻草矮病毒(Rice grassy stunt virus,RGSV)侵染引起的水稻根系发育不良的相关蛋白,解析根系发育不良症状的形成机理以及水稻草矮病毒与水稻互作的分子机制,采用双向荧光差异凝胶电泳(2D-DIGE)结合基质辅助激光解析串联飞行时间质谱技术(MALDI-TOF-MS)对RGSV侵染水稻后根系的差异表达蛋白进行分离和鉴定,并对鉴定的差异表达蛋白进行GO聚类分析和KEGG生物通路注释。结果表明,差异倍数大于2的蛋白质点有56个,其中,表达丰度升高的点有34个,表达丰度下降的点有22个;质谱成功鉴定出27个蛋白质点,分属于25种蛋白质。GO聚类分析表明差异表达蛋白涉及14个生物学过程,在生物功能上分属10类。细胞组件分析显示差异表达蛋白定位于不同的细胞部位。KEGG通路分析显示差异蛋白参与了12个生物通路。 相似文献
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几种化学药剂对杂交籼稻汕优63自然老化种子引发效果研究 总被引：1，自引：0，他引：1
用聚乙二醇（PEG）、聚乙烯醇（PVA）、KNO3、PEG＋KNO3、PVA＋KNO3等几种化学药剂对自然老化的杂交籼稻汕优63种子进行引发效果研究,以筛选最佳处理方法。结果表明,从引发效果和经济实用两方面考虑,以0.5%PVA＋1.0%KNO3处理1 d为最佳。经过该处理的汕优63自然老化种子的发芽率显著提高,比对照（63.0%）提高了11.7个百分点,活力指数、发芽势、苗高、苗重也均较对照显著提高,且成本较低。 相似文献