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休眠茄子种子发芽技术研究 总被引:2,自引:0,他引:2
以济南市种子公司当年刚收获的鲁茄3号休眠种子为试验材料,研究了发芽温度、发芽床、发芽床用水三因素对休眠茄子种子发芽势及发芽率的影响。结果表明,休眠茄子种子最适宜的发芽条件是发芽温度25℃,发芽床砂中,发芽床用水为0.3%的KNO3水溶液。 相似文献
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新收获的大葱种子虽然休眠期不长,但确实存在着一定时间的休眠.如果用GB/3543-1995<农作物种子检验规程>规定的发芽条件做发芽试验,其种子发芽速度慢,发芽势及发芽率低,不能真实地反映种子的实际发芽力,这给种子检验经营工作带来很大不便.本试验通过不同温度,不同发芽床的种子发芽以探求休眠大葱种子最适宜的发芽条件,为种子检验、经营工作者提供可靠、快速、实用的大葱种子发芽技术. 相似文献
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水稻种子的发芽规律及其控制措施研究 总被引:2,自引:0,他引:2
不同成熟度的水稻种子发诫测定结果表明,成熟度越高,种子的发芽能力越高,种子的发芽率在开花授粉后20天就可达到70%、25天可达到80%以上,烘干处理不能提高成熟度(指开花授粉后的天数)中等的种子发芽力,而且使其发芽势降低,研究结果表明,成熟度高的水稻种子不经风干就可进行发芽,而且发芽势高,另外,5种外源药剂有解除种子休眠的作用,提高发芽率,其中1%H2O2、0。2NH2SO4和0.2N硝酸钾处理的 相似文献
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种子的发芽和休眠(Ⅱ) 总被引:1,自引:0,他引:1
ABA不敏感突变型 vp1和 abi3在 ABA存在时也能发芽 ,这表明它们的野生型的相应基因产物参与了休眠的调控。因而 ,我们是否可以鉴别出这些由玉米 VP1和拟南芥菜 ABI3野生型的基因产物 ,从而解释为什么野生型种子对 ABA敏感而不能发芽 ?VP1和 ABI3这两个结构类似的基因编码某种蛋白 ,这个蛋白含有一个具有转录激活子特性的区段 (Mc Carty等 ,1991;Giraudat等 ,1992 )。它们不能在 vp1和 abi3突变体中合成 ,由此便产生了许多多效性效应 ,包括降低了一些种子成熟时期特有蛋白的合成 (如 Em蛋白、L EA蛋白 ;Paiva和 kriz,1994) ,降低… 相似文献
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以早稻中早25收割后进行33h 40℃烘干处理的种子为试验材料,研究低温烘干种子在不同处理下的发芽表现。结果表明:低温烘干能够降低种子遭霉菌感染程度,提高发芽率,但不能有效解除种子休眠,也不能有效提高种子的发芽势。低温烘干种子在未晒种发芽前湿润处理发芽率为83%,显著高于CK,未晒种发芽前浸泡处理发芽率为81%,高于CK但差异不显著;低温烘干种子在晒种后发芽前湿润处理和晒种后发芽前浸泡处理下的发芽率分别为85%和86%,均高于CK,但差异不显著。晒种后的低温烘干种子平均发芽势和发芽率分别为83.5%和85.5%,发芽势与未晒种相比差异显著,发芽率差异不显著。提出低温烘干种子在播种前宜进行晒种。 相似文献
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The effects of incubation temperature on germination of intact and dehusked japonica rice that had been harvested every 5 days from 10 days after anthesis (DAA) to 70 DAA were surveyed. At 30 °C incubation, the germination percentage of intact seeds at 25 DAA exceeded that of dehusked seeds. This tendency persisted until 65 DAA, when around 95% of both intact and dehusked seeds germinated. Germination percentages of intact seeds incubated at 20 °C were lower than seeds incubated at 30 °C for all DAA. However, germination percentages of dehusked seeds incubated at 20 °C were consistently higher than at 30 °C. Germination percentages of intact and dehusked seeds were similar at 20 °C incubation. Germination of intact seeds under 34/11 °C (16/8 h) was higher than at 30 °C. In contrast, germination of dehusked seeds under 34/11 °C (16/8 h) was lower than at 30°C. Inhibitory effects of removing husk on germination were observed from 15 to 70 DAA. Almost all of the intact seeds at 45 DAA germinated when imbibed 35, 30 and 25 °C, and germination percentages decreased with decreasing incubation temperatures from 20 to 15 °C. By contrast, germination percentage of dehusked seeds was highest in 20 °C incubation temperature; further increase or decrease of incubation temperature reduced germination percentage. The optimum germination temperature of intact and dehusked seeds of japonica rice differs during seed formation, such that the extent of germination inhibition by husk removal depends on the incubation temperature. 相似文献
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鸢尾属植物种子休眠原因及提高萌发率方法综述 总被引:1,自引:3,他引:1
鸢尾属植物种子普遍具有休眠特性。其休眠原因主要有三个方面:种皮的机械阻碍;种子中存在抑制物;种子需要后熟。针对其休眠特性,提高其萌发率方法有:去除珠孔端种皮:淋洗;低温层积;化学物质处理;电离辐射等。 相似文献
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Summary High levels of germination have been achieved by sowing strawberry seeds on the surface of a peatbased compost and then placing the boxes in a mist-propagation unit. With this technique time-consuming pre-chilling treatments can be avoided without loss of germination. The few cultivars that do not respond adequately to these conditions can be further stimulated by pre-soaking the seed in 5000 ppm CEPA (Ethrel) for 24 hours.Botanically the so-called seeds of strawberries are achenes, but to avoid possible misunderstanding they are referred to as seeds throughout. 相似文献
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探讨大叶千斤拔种子发芽最佳基本条件和种子的寿命,为栽培生产提供科学依据。测定种子的吸水率;通过磨破种皮、热水处理和浓硫酸处理等找到破除种子硬实的最佳方法;考察不同温度和光照、发芽床、贮藏对种子萌发的影响。结果表明,大叶千斤拔种子吸水率为31.26%,种皮透水性差是影响种子发芽的关键因素。种子适宜萌发的温度范围为25~30℃,发芽前用磨擦种皮+80℃热水浸种4 h的方法可使种子的发芽率提高到66.67%;光照和发芽床对种子萌发无显著影响。种子在4℃低温条件下贮藏3年发芽率仍有61%,贮藏4年发芽率降至32%。综上,大叶千斤拔种子为硬实性种子,发芽前需要预处理;种子为高温萌发型、光中性种子;种子寿命在4年以上。 相似文献
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Summary Pre-soaking strawberry seed (Fragaria ananassa
Duch.) in osmotic solutions accelerated and partially synchronized their germination. Pre-soaking advanced 50% germination from about 4 weeks to 4 or 5 days. Two to three weeks pre-soaking in a mineral solution of -106Pa nominal osmotic potential at about 20 C was satisfactory. The resulting synchronization of germination could allow seedlings to be selected for rate of growth by directly comparing seedling in bulk sowings. 相似文献
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超干燥水稻种子贮藏研究 总被引:15,自引:7,他引:15
硅胶作干燥剂,超干燥水稻种子(灿,粳)。研究不同干燥方式的干燥速度及对种子生活力的影响。由含水量8.1% ̄9.4%干燥至7%、5%、4%、3%,2%后密封贮存于0℃,温室(15 ̄30℃),45℃。定期测定种子生活力和活力。结果表明,种子与硅胶重量之比1:10加风扇干燥速度最快,几种干燥方式对种子生活力没有影响。水稻种子的超干燥临界含水量为3%。经过5年3个月的贮藏后表明,贮于45℃老化的籼,粳稻种 相似文献
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磁场处理对紫苏种子萌发的影响 总被引:1,自引:1,他引:1
试验采用20.9mT和42.5mT两个剂量的磁场对紫苏种子进行处理,处理时间分别为0h、1h、2h、3h、4h、5h。结果表明:20.9mT磁场强度处理紫苏种子,处理3h时发芽率最高,可达89%;在42.5mT磁场强度处理下,不同处理时间内种子发芽率均达到90%以上,远远高于对照,说明42.5 mT磁场强度处理紫苏种子有利于种子萌发;在42.5mT的磁场强度下,3h的磁场处理对株高、根长和须根数的增加都有明显促进作用;POD和硝酸还原酶活性在3h时相对增幅最大,说明42.5mT的磁场强度处理紫苏种子时,3h为最佳处理时间。 相似文献