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大豆种子脂肪氧化酶同工酶缺失体的超弱发光研究 总被引：7，自引：0，他引：7
利用超弱发光方法对具有不同脂肪氧化酶同工酶缺失体的大豆种子进行整体水平上的测试，跟踪测量了在种子吸涨到萌动以及发芽的全过程中顷豆种子超弱发光的变化，并且测定了它们的发光谱线。探索用发光强度鉴别是否有缺失Ｌｏｘ３异型材料的可能性和有效性；同时通过超弱发光发射光谱的差异来进一步 相似文献
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棉花种子播前处理效果调查 总被引：1，自引：0，他引：1
棉花种子播前处理效果调查①产焰坤裴俊德安徽省农科院棉花研究所安庆２４６００３选用不同品种，采用浸种１０小时和浸种６小时后催芽两种处理方式，分两次试验，均以干子为对照。播前浇足底水，采用同一浇水量，同一播种深度，并用地膜覆盖和露地直播，观察其出苗率。选... 相似文献
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研究浸种对杂交籼稻种子吸水的影响,为杂交籼稻生产浸种催芽提供参考。采用3个杂交籼稻组合的干种子、超干种子,设置10,20和30 3℃个浸种水温及6,12,18和24 h 4个浸种时间进行处理,然后测定计算浸种后的种子水分、吸水率、吸水速率。结果表明,浸种水温和时间与浸种后的种子水分、吸水率、吸水速率密切相关,其中吸水速率与浸种时间呈极显著负相关,水分、吸水率与浸种水温和时间之间呈显著或极显著正相关。3个杂交籼稻组合都是浸种前期即浸种6 h前吸水快,浸种6 h后相同杂交组合的超干种子、干种子的种子水分差异不显著。3个杂交籼稻组合的干种子、超干种子都在水温10℃浸种18~24 h、水温20℃浸种12~18 h、水温30℃浸种6~12 h后种子水分达到25.2%~32.7%,可满足种子发芽对水分的需要。 相似文献
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大豆脂肪氧化酶同工酶缺失体的苗期叶片超弱发光研究 总被引：3，自引：2，他引：3
本实验通过测定大豆脂氧酶同工酶缺失体在苗期子叶和真叶的超弱发光变化，研究脂氧酶缺失体类型与叶片超弱发光强度的关系，试图使用苗期叶片等活性材料直接进行同工酶缺失体鉴定成为可能。 相似文献
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1选择优良品种良种的增产效果十分显著,一般情况下,优良品种比一般品种每公顷增产子棉750kg左右。选择棉花品种有几个原则:轻病地块选择丰产性突出的品种,重病地块选择抗病性突出的品种,水肥条件不好的瘠薄地块选择生长势强的品种,高水肥地块、粘土地选择长势稳健的品种。2解除种子休眠部分棉花种子因生长期间积温不足而休眠期长,播种时不能正常发芽出苗。实践经验证明把棉花种子放在温暖的地方保管,可解除休眠。3浸种种子含水量为风干种子重量的60%时,最适合发芽,含水量过大或过小都不利于发芽。毛棉子浸种时间应在6小时左右,不应超过10个… 相似文献
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一、试验处理包括对照共五个处理:1.70%甲基托布津粉剂拌种:棉籽先用清水浸14小时,然后捞出按种子重量的0.8%拌药。2.20%稻脚青粉剂拌种:方法及用药量同上。3.40%多菌灵胶悬剂浸种:棉籽用种子重量2.5倍的0.3%多菌灵胶悬剂药液浸14小时后,捞出。4.70@2抗菌剂浸种:棉籽用种子重量2.5倍的2,000倍70@2药液在55～60℃的温度下浸闷半小时后,捞出。5.对照:棉籽用清水浸14小时后,捞出。二、试验项目及方法1.发芽率测定用同一品种同一期籽棉轧出的质量相同、重量相等的棉籽,经不 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
8.
用不同浓度的强氯精溶液处理不同活力的杂交稻种子，结果表明，在处理后１～２天间，种子萌发表现弱势，随后，幼苗活力由弱转强。最有利于种子发芽的浓度为１：３００。在用强氯精消毒时，还应配合间歇浸种措施，以促进发芽。 相似文献
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试验证明:杂交稻陈种(隔年乃至两年陈种)在生产上是可以利用的,关键是其浸种催芽技术要求较高。大面积生产上因浸种催芽技术掌握不当,造成发芽不整齐,甚至烧芽的事屡有发生。1985年我们进行了杂交稻陈种不同浸种方法和浸种时间催芽效果比较试验,以期为杂交稻陈种的利用提供可行的催芽技术。 二、试验处理 试验材料系1983年生产的汕优3号隔年陈种。浸种方法分换水和不换水两种处理。换水浸种为种子日浸夜露,日换水3次(模拟生产上的活水浸种);不换水处理为种子连续浸.2—3昼夜(摸拟生产上的死水浸种)。换水浸种的分设浸24小时、48小时和72小时… 相似文献
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以菘蓝种子为试验材料,采用不同浓度的PEG-6000溶液模拟干旱胁迫,研究了三种处理方法即ABT浸种﹑CaCl2浸种﹑吸湿回干以及对照对菘蓝种子抗旱性的影响。结果表明:对照组中,在5%PEG6000胁迫条件下,菘蓝种子发芽势发芽指数达到最大为30.67%、21.01,说明菘蓝种子本身具有一定抗旱性,适当水分胁迫对菘蓝种子发芽势发芽率发芽指数及胚根下胚轴生长有促进作用,高胁迫对上述指标有抑制作用;电解质外渗率随水分胁迫强度的增加而降低。三种处理方法中,CaCl2浸种处理提高菘蓝种子抗旱性的作用最好。 相似文献
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通过对水稻护苗种衣剂包衣稻种采用"循环水浸种技术",测试药剂脱落对防病效果影响情况,结果表明:利用有氧恒温浸种机浸种或循环泵浸种,不会造成严重的药剂脱落现象,不会影响药剂的防病效果,而且还可以提高浸种质量,提高籽粒发芽势和出苗率,使得水稻出苗快且整齐。 相似文献
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丹东杂草稻种子的耐冻能力和低温发芽特性研究 总被引：36，自引：1，他引：35
为了解丹东杂草稻种子冬季在野外能存活的原因,将丹东杂草稻和对照品种越光的干种子在水中浸不同时间,后在-20℃下处理7 d,在25℃下发芽。对照品种越光在浸种1 h后冷冻处理,其种子的发芽率从98％降为4％,浸种时间延长到1.5 h已不能成苗,而丹东杂草稻种子在1 h浸种处理后,其发芽基本不受影响,甚至在3 h浸种处理后成苗率仍达2.3％。在不同低温下发芽试验中发现丹东杂草稻在11℃能发芽,杂草稻的发芽临界温度要比对照越光低。讨论了杂草稻种子抗冻的潜在价值。 相似文献
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The seeds of three promising advanced lines of soybeans (TGx 923-2EN, TGx 1019-2EN and TGx 1497-1D) which were part of a larger collection evaluated in agronomic field trials in Nigeria were selected for characterization
of physicochemical properties, chemical composition, water absorption, cooking time and cooked texture as a function of soaking
and cooking. Seed density, leached solids, swelling capacity and seed coat percentage were within a range of 1.15 to 1.26
g per ml, 1.00 to 1.26 g per 100 g, 80.25 to 84.35 g per 100 g and 6.6 to 10.1% w/w of dry beans, respectively. The total
polyphenol content of the cream colored beans was similar (0.75 to 0.76 mg/g) but higher than the amount (0.60 mg/g) found
in the white beans. Cooking times varied between 71 and 96 min without soaking and were reduced by about 32.0% following a
presoaking treatment in water for 12 hours at room temperature (28±1°C). Small seeds absorbed higher amounts of water during
soaking and required less cooking time than larger seeds. Unsoaked beans required 40 min of cooking to achieve the same degree
of cooked texture as the soaked beans cooked for 20 min, suggesting that cooking times and cooked texture for all lines were
improved through soaking. 相似文献
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由于种子的成熟度及藏年限的不同，使不同年度采收种子的活力之间有很大差异，其发芽后的整种子及其粉碎后的提取液的发光也有很大差异，发芽４～１６天的整种子发光强度与种子的发芽率及发芽指数之间的相关达到了显著或极显著的水平。其提取液发光强度的变化曲线因萌发天数的不同而有规律的变化，低发芽率或发芽天数少于４天的种子提取液的发光强度的变化趋势是平滑下降，随着发芽天数的增加，高发芽率种子提取液的发光强度出现了峰谷变化，而低活力种子的发光强度的变化趋势则仍然是平滑下降。说明发芽后的整种子或其提取液的发光与原样的代谢活性密切相关，提取液中的发光物质的浓度和发芽的天数有关。 相似文献
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甲醇老化可使花生种子活力下降,30％甲醇处理量甲醇老化的临界浓度。甲醇老化降低萌发花生种子乙烯的释放量,改变乙烯的释放模式。甲醇老化使细胞透性急剧增加,渗出率比人工老化种子高,而呼吸强度则比人工老化种子低。PEG渗调对低浓度甲醇(10％)老化种子有提高活力的作用,对20％或以上的浓度则有加速种子老化的作用。表明甲醇老化与人工老化对花生种子活力的影响有明显的不同。 相似文献
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《Plant Production Science》2013,16(4):393-396
AbstractThe growth characters and productivity of the soybean plants that developed from seeds stored for various periods at 5°C and 40% relative humidity, but having 80% or higher germinability were examined in comparison with those of newly harvested seeds (new seeds). The seedlings at one month after sowing from the very old seeds (stored for 10 years and 7 months) showed morphological characters significantly different from those from the new seeds, but not those from the moderately old seeds (stored for 2 years and 7 months) or the old seeds (stored for 7 years and 7 months). In the plants from the old seeds, the mean emergence date, flowering date, maturing date, length of the main stem, yield components, seed yield, and inspection-grade or protein content of seed were not significantly different from those in the plants from the new seeds. On the other hand, in the plants from the very old seeds, the mean emergence date, length of main stem, yield components and seed yield were significantly different from those in the plants from the new seeds. We concluded that the seeds of soybean stored for 2 years and 7 months, or 7 years and 7 months having a germinability of higher than 80% are practically useful, and show normal growth characters and productivity. However, it should be noted that the seed storage for over 10 years had inferior grain yield. 相似文献
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Neem seeds contain many substances with insecticidal properties, the main insecticidal ingredient being azadirachtin A. In developing countries such as Mali, a neem seed water extract is prepared by soaking ground seeds in water for three or seven days. The aim of this study was to check the effectiveness of this extract in terms of azadirachtin A extraction yield and insecticidal activity. The yield of extraction was 0.19 g azadirachtin A/100 g seeds. The concentration of azadirachtin A in the seed extract was approximately 200 mg l−1, eight times higher than the recommended concentration of commercial products (25 mg l−1). A comparison of the extractive capacity of different solvents indicated that the best solvents were water and methanol. The azadirachtin A concentration declined in extracts stored for more than 3 days at a temperatures higher than 30 °C. Bioassays were performed on target insects (the leafhopper Macrosteles quadripunctulatus, the moth Spodoptera littoralis and the tobacco whitefly Bemisia tabaci) in order to compare the insecticidal activity of the neem extract with that of the commercial product Neemazal T/S and of a solution of pure azadirachtin A. The bioassays conducted on the leafhopper and the moth demonstrated that the neem extract at the recommended concentration (25 mg l−1 active ingredient) was as effective as the azadirachtin-based commercial product at the same concentration, while for the control of the whitefly B. tabaci a higher concentration of the water extract was needed. 相似文献