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马铃薯块茎生长过程中内源赤霉素和脱落酸含量的变化 总被引：5，自引：0，他引：5
以紫花白和晋薯２号两个品种为材料，研究了马铃同一个体株，处于 不同生长阶段上的块茎，其内源ＧＡ３和ＡＢＡ含量的变化规律。结果表明：开始形成的块茎中ＡＢＡ的ＧＡ３含量是是高，但ＧＡ３／ＡＢＡ的比值则较低；之后随着块茎的膨大，ＡＢＡ和ＧＡ３含量远逐渐降低，但ＡＢＡ的降低速度大于ＧＡ３，从而使ＧＡ３／ＡＢＡ的比值逐渐增加，到块茎成熟时，ＡＢＡ和ＧＡ３都有所增加。 相似文献
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以紫花白和晋薯２号两个品种为材料，研究了马铃薯同一个体植株中，处于不同生长阶段上的块茎，其内源ＧＡ３和ＡＢＡ含量的变化规律．结果表明：开始形成的块茎（块茎直径１ｃｍ左右）中ＡＢＡ和ＧＡ３含量最高，但ＧＡ３／ＡＢＡ的比值则较低；之后随着块茎的膨大，ＡＢＡ和ＧＡ３的含量均逐渐降低，但ＡＢＡ的降低速度大于ＧＡ３，从而使ＧＡ３／ＡＢＡ的比值逐渐增高，到块茎成熟时，ＡＢＡ和ＧＡ３都有所增加。而由块茎迅速膨大到成熟的过程中，ＧＡ３／ＡＢＡ的比值则又逐渐降低。两个品种在块茎生长过程中，内源ＧＡ３和ＡＢＡ的含量具有相似的变化规律．成熟期块茎平均直径较大的紫花白，当块茎直径小于５ｃｍ左右时，其中ＧＡ３的含量大于相应大小的晋薯２号，后期两个品种之间则基本无差异；而ＡＢＡ的含量在两个品种之间则始终无多大差异；因此使ＧＡ３／ＡＢＡ的比值在块茎直径小于５ｃｍ以前紫花白大于晋薯２号。因此我们认为ＧＡ３和ＡＢＡ在块茎开始形成与膨大及成熟的整个生长过程中，对块茎的形成和生长发育具有负反馈调节与协同作用． 相似文献
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马铃薯蕾花果脱落与内源激素和光照的关系 总被引：3，自引：0，他引：3
以乌Ｈ_４比的母本０８１和父本ＮＳ４０－３７为材料,通过田间和室内试验,对马铃薯蕾花果脱落过程中内源激素变化进行研究,阐明了内源激素的变化规律及ＩＡＡ、ＧＡ_３、ＡＢＡ、Ｚ、ＺＲ对蕾花果脱落的具体作用方式;同时研究了不同光周期和光照强度与脱落的关系及所引起的内源激素的变化。结果表明,蕾花果中ＡＢＡ含量升高是引起脱落的主要原因,不利的外界因素可诱发ＡＢＡ的变化,而长光周期和充足的光照有助于减少蕾、花、果的脱落。 相似文献
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外源生长物质对农垦58S育性转变的影响 总被引：11，自引：0，他引：11
用农垦５８ｓ为材料，在盆栽自然长日不育条件下，从第一次枝梗分化末期开始喷施外源生长物质，结果表明：ＩＡＡ、ＱＴ作用明显，使植株达到部分可育；ＡＢＡ的作用甚微； ＧＡ_3对育性没有影响，但在ＧＡ_3＋ＡＢＡ共同作用下，却能达到部分可育。测定引起育性转变各处理的吲哚乙酸氧化酶和过氧化物酶活性表明，在上述外源物质的作用下这两种酶活性均有降低的趋势，这说明农垦５８ｓ长日不育可能与ＩＡＡ含量有关。 相似文献
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用α－萘乙酸、吲哚丁酸、ＡＢＴ３号生根偻、２，４－Ｄ四种激素，每种激素３个农度，浸泡侧柏苗木根系２ｈ后，进行造林试验。结果表明每种激素的适宜浓处理对提高干瘠立地条件下侧柏造林成活率都有促进作用。以１００ｐｐｍ吲哚丁酸效果最大，造林成活率可达９３％；其次为５０ｐｐｍＡＢＴ３号生根粉，成活率达８８％。 相似文献
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萘乙酸,吲哚丁酸,赤霉素对脱毒马铃薯扦插苗成活率的影响 总被引：3，自引：0，他引：3
试验研究了不同浓度萘乙酸（ＮＡＡ）、吲哚丁酸（ＩＢＡ）、赤霉素（ＧＡ３）混合使用对马铃薯脱毒苗扦插成活的影响。结果表明,以浓度ＮＡＡ５０ｍｇ／Ｌ＋ＩＢＡ５０ｍｇ／Ｌ＋ＧＡ３ ３ｍｇ／Ｌ为扦插处理的最佳组合,成活率最高,生根最好,长势最强． 相似文献
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用５ｍｇＢＡ·ｇ＾－１羊毛脂和１０ｍｇＧＡ３·ｇ＾－１羊毛脂分另处理花生幼苗第３叶（从上往下）叶片，增加＾１４Ｃ－光合产物从标记叶的输出。ＢＡ使光合产物较多地向第１叶运转，还原糖，淀粉和可溶性糖含量在第１叶的积累增加。ＧＡ３的处理，使茎部和处理叶分布较多的＾１４Ｃ－光合产物，并具高含量的还原糖，淀粉和可溶性糖。 相似文献
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甜菜当年抽薹株与不抽薹株内源激素含量及平衡状况的动态变化 总被引：2，自引：0，他引：2
本试验研究了甜研７号当年抽薹株、不抽薹株和母根生育期间新生嫩叶内源植物激素含量及平衡状况的动态变化。结果表明，当年抽薹株各时期赤霉素（ＧＡ＿（１．３））、脱落酸（ＡＢＡ）含量与当年不抽薹株差异显著，且在抽薹期间（６月５日～６月２０日）ＧＡ＿（１．３）含量激增，ＡＢＡ含量有所增加，而ＧＡ＿（１．３）／ＡＢＡ值也呈激增趋势。ＧＡ＿（１．３）和ＡＢＡ含量，特别是ＧＡ＿（１．３）／ＡＢＡ值与甜菜当年抽薹关系密切。 相似文献
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研究了不同N、P、K及密度配合，以及化控措施对赣豆4号产量和经济性状的影响。结果表明：处理6（A2B3C1D2)、8（A3B2C1D3）、4（A2B1C2D3）产量最高，分别为2835.84kg/hm^2、2818.08kg/hm^2和2816.28kg/hm^2。密度和K肥对产量影响达极显著水平，N肥影响达显著水平，而P对产量的作用不大。K能促进产量构成因子的形成，提高单株生产力。随着密度增大、N肥用量的增加，株高增加，分枝减少，单株荚数、粒数、单株生产力降低，百粒重减轻。P对促进分枝、提高单株荚数有一定的作用。多效唑、叶面喷肥、钼酸铵拌种、根瘤菌拌种分别比常规种植增产14.39%-5.16%。高产试验平均产量达2673.6-2814.3kg/hm^2，最高产量达3429kg/hm^2，高产示范平均产量2496.5kg/hm^2。 相似文献
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为探索营养液的成分及浇灌次数对微型薯的数量及产量的影响,设计了3种营养液成分A_1,A_2,A_3和3种浇灌次数B_1(两天浇1次),B_2(4天浇1次),B_3(6天浇1次)。研究结果是:选择A_2营养液,每4天浇1次或6天浇1次就可达到低成本、省工、省力、薯块数量多、产量高、大中薯率高的优质脱毒微型薯。 相似文献
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研究羽叶决明(Chamaecrasta nictitans)代木栽培鸡腿菇(Coprinus ovatus)对其绝对生物学效率、基物失重、呼吸消耗及木质纤维素转化的影响.结果表明,羽叶决明牧草替代60%木屑(A60)栽培鸡腿菇的绝对生物学效率最高,均为10.77%.覆土前和采收后的基物失重和呼吸消耗都以A0(CK)为最高,分别为11.47%、11.47%和31.75%、25.55%,其木质素转化率也最高,为79.21%;纤维素转化率以A100(羽叶决明牧草替代100%木屑)为最高,达50.93%;半纤维素转化率以A40(羽叶决明牧草替代40%木屑)为最高,为49.74%.回归分析结果表明,绝对生物学效率和半纤维素转化率与替代比例呈抛物线相关,而基物失重、呼吸消耗及木质素、纤维素转化率与替代比例呈线性相关. 相似文献
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《水稻科学》2017,(2)
An efficient and good DNA extraction protocol should be simple, affordable and yield enough DNA with high quality. Rice(Oryza sativa L.) DNA extraction methods often use seedlings or leaves rather than the grains and tend to be time-consuming, involve multiple steps, and use hazardous chemicals and expensive enzymes. Rice grains offer several benefits over seedlings and leaves as a source of DNA for genetic analysis. However, these benefits are underutilized because the bulk of a rice grain is made up of starch. It is particularly important, but difficult to get rid of the starch while extracting DNA from rice grains. This co-precipitated polysaccharide is a known inhibitor of DNA polymerase activity in polymerase chain reaction(PCR). We describe here a very simple and highly affordable Chelex~?-100 based DNA extraction method from rice grains. It does not require any hazardous chemicals or enzymes. This method reproducibly extracts DNA with good purity indices(A_(260)/A_(230) and A_(260)/A_(280) values), but requires only a few steps. 相似文献
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高光效大豆品种豆荚解剖学特性 总被引：10，自引：3，他引：10
采用光合速率不同的大豆品种黑农37（普通高产品种）、黑农40和黑农41（高光效品种），分别于R3、R4、R5、R6和R7时期取荚进行了解剖学观察。结果表明：1.不同光合类型品种间，豆荚表皮上气孔密度彼此接近，无明显差别；2.豆荚同化组织细胞内叶绿体数目，高光效品种均大于普通高产品种，且在相同品种中豆荚叶绿体分布的密度为豆荚的两端大于豆荚的两面。在R6时期叶绿体的体积高光效品种也大于普通高产品种。叶绿体中基粒的数目也是如此；3. 豆荚两侧维管束密度以及腹、背部导管数目高光效品种均大于普通高产品种。 相似文献
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F. E. Alder S. J. Cowlishaw † J. E. Newton D. T. Chambers ‡ 《Grass and Forage Science》1968,23(1):81-87
The treatments in this summer–grazing experiment were designed as a 2 × 3 factorial, there being two levels of nitrogenous fertilizer (nitro–chalk), supplying 0 and 336kg of N/ha per annum (NO and N3, respectively) and three stocking rates. The fertilizer was applied in 7 dressings at approximately three–weekly intervals. The animals used were Hereford x Friesian steers; these were slaughtered at the end of the grazing season. The stocking rates were calculated on the basis of expected herbage production. The experiment was laid out in 6 randomized blocks which were grazed in rotation. Two blocks were cut for conservation before grazing each year; up to the end of June only 4 blocks were used for grazing.
There was little contamination of the swards with unsown species. With the NO swards the clover contents declined each year, but remained fairly high at over 20% in 1965. Clover contents also declined each year in the N3 swards and by 1965 were only 2 to 4%.
The quantities of herbage cut for conservation were higher from the swards receiving N. The live–weight gains of the cattle (per head) were higher at the lower stocking rates, the effect of stocking rate being more noticeable in the July to Oct. period. Live–weight gains per ha increased at the higher stocking rates. In 1963 and 1965, as stocking rates increased carcass weights per animal decreased and carcass quality, as indicated by the commercial grades, was poorer. In 1964, a dry spell from July to Oct. necessitated the removal of cattle from the experiment and the effects of treatment on carcass weight and quality were not apparent. 相似文献
There was little contamination of the swards with unsown species. With the NO swards the clover contents declined each year, but remained fairly high at over 20% in 1965. Clover contents also declined each year in the N3 swards and by 1965 were only 2 to 4%.
The quantities of herbage cut for conservation were higher from the swards receiving N. The live–weight gains of the cattle (per head) were higher at the lower stocking rates, the effect of stocking rate being more noticeable in the July to Oct. period. Live–weight gains per ha increased at the higher stocking rates. In 1963 and 1965, as stocking rates increased carcass weights per animal decreased and carcass quality, as indicated by the commercial grades, was poorer. In 1964, a dry spell from July to Oct. necessitated the removal of cattle from the experiment and the effects of treatment on carcass weight and quality were not apparent. 相似文献