共查询到19条相似文献，搜索用时 703 毫秒
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为了探究低温贮藏年限对小粒大豆种子活力及幼苗质量的影响,以3种不同熟期的小粒大豆品种为试验材料,设置5个贮藏年限处理,研究低温贮藏条件下小粒大豆种子活力及幼苗质量的变化规律.结果 表明:随着贮藏年限的增加,不同小粒大豆品种的种子活力和幼苗质量相关指标变化规律基本相同,种子发芽势、发芽率、发芽指数、活力指数、正常苗率及幼苗质量相关指标均随贮藏年限的增加呈降低趋势,种子浸提液电导率呈上升趋势.不同品种耐贮能力有较大差异,东农690和吉林小粒6号种子的安全贮藏期为1年;九芽豆1号耐贮性较好,安全贮藏期为2年. 相似文献
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甜菜种子活力鉴定指标的研究 总被引：3，自引：0，他引：3
对不同种子活力的甜菜种子发芽率、发芽势、活力指数、发芽指数、物质效率、贮藏物质运转率以及种子萌发时期酸性磷酸酯酶、脱氢酶活性进行了比较研究,结果表明,高活力种子的发芽势、发芽率、活力指数、物质效率、贮藏物质运转率均大于低活力种子。种子萌发24h后,高活力种子中酸性磷酸酯酶活性大于低活力种子,萌发初期,胚根中的脱氢酶活性也表现为高活力种子大于低活力种子。依据可重复性和可操作性原则,种子贮藏物质运转率、胚根脱氢酶活性可作为鉴定甜菜种子活力大小的可靠生理指标。 相似文献
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花生种子药剂处理贮藏技术的生理基础研究Ⅰ. 药剂处理对种子活力和自由基含量的影响 总被引：6，自引：2，他引：6
本研究利用不同药剂和不同药剂剂量对泉花 1 0号种子进行处理贮藏后 ,测定其种子活力和自由基含量等生理生化指标 ,结果无论常温贮藏还是高温老化条件下药剂处理的种子发芽率、种子活力和发芽指数等均高于未处理种子。进一步研究发现 ,药剂处理贮藏的种子质膜透性低 ,体内O- 2 、H2 O2 等含量比对照低 ,而丙二醛含量和过氧化值与对照相比不呈规律性变化。说明药剂处理贮藏可有效地减轻自由基对种子的伤害 ,从而保持种子活力、延缓种子衰老 相似文献
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胚乳裂纹对玉米种子活力指标的影响 总被引：1，自引：0，他引：1
以玉米杂交种种子为试验材料,研究胚乳无裂纹、胚乳单裂纹、胚乳双裂纹和胚乳龟裂纹种子的发芽势、发芽率、发芽指数、活力指数变化。结果表明,24 h内的吸水率表现为龟裂纹种子的吸水率最高,无裂纹种子的吸水率最低。随着胚乳裂纹数的增加其种子发芽势、发芽率、发芽指数和活力指数均呈降低的变化趋势。胚乳无裂纹的种子发芽势、发芽率、发芽指数和活力指数显著高于胚乳龟裂纹的种子发芽势、发芽率、发芽指数和活力指数。种子胚乳无裂纹的幼苗干重显著高于胚乳龟裂纹的幼苗干重。胚乳龟裂纹是导致种子活力降低的原因之一,在种子生产中应该减少胚乳龟裂纹产生。 相似文献
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为确定柱花草种子在低温条件下的安全贮藏年限,本研究以低温环境(5～7℃)下贮藏1～8 a的9份柱花草种子为实验材料,通过测定其发芽率、发芽指数、活力指数,对不同贮藏年限柱花草种子的萌发特性进行研究。结果表明：在5～7℃条件下,柱花草种子活力(发芽率、发芽指数、活力指数)随贮藏时间的增加而降低,西卡柱花草种子耐贮藏能力显著低于圭亚那柱花草,而圭亚那柱花草中TPRC90105柱花草种子最耐贮藏,TPRC90144柱花草种子最不耐贮藏。据试验结果确定,圭亚那柱花草种子低温条件下的贮藏年限应不超过5 a,而西卡柱花草种子应不超过4 a。该研究结果为柱花草种子的长期、安全贮藏提供了有力的理论依据。 相似文献
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不同收获期春大豆种子贮藏后的活力研究 总被引：10，自引：1，他引：9
试验研究了三种不同播期（春播，夏播，秋播）下的春大豆在黄熟期，完熟期，过熟期收获的种子，经低温密封贮藏４年后活力的差异。结果表明：完熟期（Ｒ８）种子活力最高，过熟期（Ｒ８后）次之，黄熟期（Ｒ７）种子活力最低。与种子活力相应的生理生化指标；种子发芽势，种子发芽率，种子外渗量以及过氧化物酶无冯完熟期种子表现为优。 相似文献
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采用NCII设计(6×7)组配42份杂交组合,采用随机区组试验,测定杂交组合的品质性状和种子活力指标,分析自交系性状配合力、遗传参数、相关系数。结果表明,组合活力指数的变异系数较大,其他性状均较小。品质性状一般配合力分析,5003改良系、Mo17变异株较优良。活力指标一般配合力分析,5003改良系、78599较优良,发芽率、发芽势、发芽指数、活力指数、脂肪、淀粉、蛋白质的广义遗传力和狭义遗传力均大于50%。除发芽率与发芽势、活力指数相关系数外,42份杂交组合的发芽率、发芽势、发芽指数、活力指数的相关系数均呈显著或极显著正相关。淀粉含量与活力指数、脂肪含量呈显著负相关;淀粉和蛋白质含量呈负相关,但未达到显著水平。 相似文献
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人工老化对大豆种子活力和生理生化特性的影响 总被引：8，自引：0，他引：8
以晋豆19号大豆种子为研究材料,对其进行40°C、100％RH高温高湿老化处理,并对种子发芽指标﹑相对电导率、可溶性糖和丙二醛含量以及4种抗氧化酶活性的变化进行测定。结果表明：随着种子老化加深种子的各发芽指标均逐渐降低, 相对电导率、外渗可溶性糖和丙二醛含量逐渐升高,铜锌和总超氧化物歧化酶随老化时间延长而增加,锰超氧化物歧化酶呈波浪式变化,过氧化物酶和谷胱甘肽还原酶活性变化的总趋势是随老化时间延长而降低,而过氧化氢酶呈先升后降趋势。种子活力和生理生化指标之间呈显著的相关性。用该老化方法评价大豆种子耐贮藏性的适宜老化时间在36～60h。在所测定的生理指标中,丙二醛（MDA）含量和过氧化物酶（POD）及谷胱甘肽还原酶（GR）活性与大豆种子活力快速下降相吻合,可作为敏感指标监测大豆种子的劣变状况。 相似文献
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The objective was to investigate the effects of moisture conditions in storage at 21 C (± 3) on true potato seed (TPS) germination and seedling vigor. The influence of supplemental nitrogen (N) during seed production on these effects was also studied. One set of TPS was stored exposed to ambient humid (> 80% RH) air; the other was stored dry (sealed with silica gel). Germination tests were performed at 7, 11, and 14 months of seed storage. Seedling vigor tests were made at 14, 20, and 23 months. The rate of germination was mostly affected by the moisture conditions during storage. Seed stored dry germinated faster than TPS stored in humid ambient air. The rate of germination increased with time in storage and the percentage of germination was always high (≥ 95%) in dry seed produced with high N. Seedling vigor was mostly affected by N treatments during seed production. High-N seed had a much higher rate and percentage of emergence and seedling dry-weight levels than low-N seed, particularly when stored dry. Seedling vigor criteria decreased with time in storage in low-N seed; in high-N seed, the rate of emergence increased and the percentage of emergence was always high (≥ 95%). In conclusion, the TPS should be produced with high N and stored dry for sowing under unfavorable conditions. 相似文献
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《Industrial Crops and Products》2003,17(1):9-14
Kenaf (Hibiscus cannabinus L.) is a potential alternative crop being developed for fiber production. Because planting area varies dramatically from year to year, seed supplies may greatly exceed use so that the excess seed must be stored for one to several years. The objectives of this study were to determine the effect of seed storage duration at 10 °C on germination, vigor, emergence, and yield. Replicated trials were established at Starkville, MS in 1999 and 2000 to evaluate field emergence and biomass yield of kenaf seed from five ‘Everglades 41’ (‘E41’) harvest year seed lots stored at 10 °C in ambient relative humidity for up to 4 years. Germination of these same seed lots under standard (20–30 °C) and cool (20 °C) temperatures, and seed vigor was evaluated over time. Field emergence was the same for the different seed storage durations up to 4 years, but was directly affected by drought conditions for each planted year. Biomass yields ranged from 12.39 to 14.57 Mg ha−1 in 1999 and 16.82 to 18.47 Mg ha−1 in 2000, but were not different between storage durations. Seed germination remained greater than 80% regardless of storage duration. Electrolyte leakage, based on conductivity, was 38–50% less with freshly harvested seed than seed stored for 4 years at 10 °C. However, neither the conductivity nor accelerated aging test were reliable predictors of field emergence. Kenaf seed stored up to 4 years at 10 °C retained germination rates acceptable for commercial use. Neither field emergence nor biomass yield was affected by seed storage duration. 相似文献
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缺氧对甘蓝型黄籽与黑籽油菜发芽的影响 总被引：9，自引：7，他引：2
随机选取甘蓝型黄籽、黑籽油菜各20个品系,将萌发中的种子进行淹水缺氧处理,观察黄籽、黑籽品系耐湿性表现.结果表明,甘蓝型黄籽油菜的相对成苗率、相对苗高、相对苗重、活力指数低于黑籽油菜,单位电导率高于黑籽油菜.无论是黄籽油菜还是黑籽油菜,品种间的耐湿性差异都很大.电导率与活力指数之间有极显著的负相关,可用来快速筛选油菜耐湿性材料. 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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One hundred true seeds of 101 genetically distinct varieties ofSolanum tuberosum which had been collected during the harvest years 1958–1978 were allowed to germinate on moist filter paper in sealed petri dishes stored at 12°C and provided with a 7 hour day. Little vigor is lost in seeds 10 years old and no varietal differences were evident. Germination in all populations commenced on the 5th or 6th day and was completed five days later. Seeds older than 10 years began germination more slowly and the populations took longer to achieve maximum germination. Varietal differences became evident in older seeds. True seed ofS. tuberosum can be stored without stringent conditions with the expectation of good germination for 15 years and some germination for 20 years. 相似文献