共查询到19条相似文献,搜索用时 46 毫秒
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甜樱桃花粉贮藏及授粉试验 总被引:2,自引:0,他引:2
在大连地区,“五.一”节前后上市的保护地甜樱桃价格是露地甜樱桃的10倍左右,因此当地的保护地甜樱桃生产规模不断扩大。但保护地甜樱桃生产屡屡发生由于坐果率低而导致产量低的问题。我们经过研究发现除温度控制不当等因素外,授粉受精不良是造成坐果率低的主要原因。为解决这一问题,我们于2002—2003年及2003—2004年进行2次试验,研究了贮藏条件对甜樱桃花粉萌发率的影响和贮藏花粉给翌年保护地甜樱桃的授粉效果,筛选出了甜樱桃花粉简便有效的贮藏措施。1材料和方法1.1甜樱桃花粉培养培养基筛选试验供试材料为甜樱桃品种砂蜜豆花粉。采集露… 相似文献
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不同花龄及贮藏条件对辣椒花粉萌发与授粉的影响 总被引:12,自引:1,他引:12
‘二金条’辣椒在露地和温室栽培,其生育期最高温度为25℃和36℃。温度和花龄影响了花粉的寿命。开花当天的花粉在24℃,RH78~90%条件下贮藏3天,生活力便降至22.7%,而在4℃RH21%贮藏一周,仍有4210的花粉具生活力。低温高湿或室温低湿下贮藏的花粉,其萌发率均低于低温低湿。不同花龄的花粉授粉结实率以开花当天的最高;4℃RH21%贮藏6天与24℃RH78~90%贮藏1天的结实率同为48%。 相似文献
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苹果富士、元帅系、金冠、印度、青香蕉5品种的混合花粉(简称花粉),经贮藏6个月和12个月,在—20±2℃条件贮藏的,其萌发率分别为67.1%—73.4%和65.1%—66.0%,无明显降低;在2±2℃条件贮藏的,其萌发率分别为31.2%—42.8%和25.4%—38.9%,有明显降低;在12±2℃条件贮藏的,其萌发率分别为5.7%和5.0%.有极明显地降低。经前述不同温度贮藏6个月,花粉萌发率与花粉滤液A260nm吸收值呈极显著的负相关,相关系数(γ)为—0.9313,决定系数(γ2)为0.9650;花粉含水量与花粉萌发率和花粉滤液的电导值、A260nm吸收值,花粉萌发率与花粉滤液电导值,均无显著相关性。花粉在5℃以下密封贮藏1年,经3年人工授粉试验,其授粉能力无明显降低。 相似文献
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猕猴桃花粉生活力与授粉观察宁德地区农业局李青宁德市农业局余泽宁闽西职业大学王在明猕猴桃是原产我国的一种落叶藤本果树,其风味独特、营养丰富,尤其富含维生素C,在国际市场上很受欢迎。过去我国的猕猴桃多呈野生状态,近十几年来栽培面积才逐渐地扩大,为了更好地... 相似文献
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1998年年2000年春季,对甜柿进行了嵌芽接和双舌接对比试验。结果表明:在泰安地区,清明节前10日内,用嵌芽法嫁接甜柿成活率较高。此法既省工、又节省接穗,便于推广应用。 相似文献
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研究了盛果期重阳红桃花柱头接受花粉能力的变化,进行了不同花期授粉的坐果率试验,对田间条件下适用的授粉方法及授粉时期提出了改进措施。试验结果认为,重阳红桃柱头在开放后近100h内,都有刺激花粉萌发的潜在能力,但与环境湿度有关,授粉最佳时期为粉白花期至粉红花期。 相似文献
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Cherimoya (Annona cherimola (Mill.)) is a subtropical fruit tree, which is cultivated in a good range of subtropical regions. In most of these areas the crop relies on hand pollination. However, following this practice, erratic fruit set is often produced, which could be related to problems in pollen handling. Indeed, very little is known of the time that the pollen remains viable and on which is the best stage to collect the anthers or pollen from the flower. The aim of this work is to evaluate pollen germinability prior and after anther dehiscence and also how the age of pollen affects pollen vigor, understood as speed of germination. Pollen samples at different times following anther dehiscence were germinated in vitro and in vivo. Pollen up to 90 min following dehiscence performed as well as freshly dehisced pollen. However, the pollen taken 120 min following dehiscence, showed a clear reduction in vigor and germinated much slower in vivo. To overcome this short pollen germinability, pollen was taken from anthers 30 and 5 h prior to natural anther dehiscence and compared with pollen taken at anther dehiscence and 20 h later. However, a reduction in germination rate was obtained in pollen taken prior to anther dehiscence. The narrow stage at which pollen can be collected together to its ephemeral germinability explains erratic results obtained following hand pollination in this crop and these results provide the clues for an adequate pollen handling. 相似文献
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A. P. George R. J. Nissen R. J. Collins T. S. Rasmussen 《The Journal of Horticultural Science and Biotechnology》2013,88(3):477-484
SummaryA factorial combination of three cultural factors (± hand-pollination, ± growth retardant, ± fruit thinning) were evaluated for their effects on fruit set and fruit size of ‘Fuyu’ persimmon (Diospyros kaki L.) in subtropical Australia (Lat. 27° S). Treatments were applied to individual shoots on mature seven year old trees. Fruit set of pollinated flowers was high compared with non-pollinated flowers (91% vs. 47%). Pollinated fruit also grew faster at all stages of fruit development and, at harvest, fresh weights were 25% heavier. Palcobutrazol significantly (P<0.05) increased fruit weight by 7% compared with controls but did not increase fruit set. Irrespective of treatment, fruit weight was not correlated (r<0.3, n.s.) with shoot length, number of nodes per shoot, fruit nodal position, shoot dry weight, leaf area per shoot, and number of leaves per shoot. Fruit fresh weight was only poorly correlated with shoot base diameter (r = 0.41*). Pollinated fruit had significantly (P<0.05) higher concentrations of nutrients (N, K, Ca, and Zn). 相似文献
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【目的】从核桃生殖生物学角度出发,研究雌花状态和不同授粉方式对新疆早实核桃花粉萌发及花粉管生长的影响,旨在了解核桃授粉受精过程的基本规律,以期为提高核桃坐果率及果实品质提供科学依据,对于核桃品种选育、品种改良以及生殖隔离研究等均具有重要意义。【方法】以乌什县主栽核桃品种‘新新2号’(Juglans regia‘Xinxin 2’)为试材,运用荧光显微技术研究核桃雌花状态附着花粉的能力和不同授粉方式(自然授粉、人工辅助自花授粉、人工辅助异花授粉)下花粉粒在柱头上的萌发及花柱中花粉管的生长状况。【结果】(1)各时期雌花柱头附着花粉数量之间存在极显著差异(P<0.01),显花期和始花期柱头不具备附着花粉的能力,V字期柱头附着花粉的数量明显低于小八字期、大八期字和翻卷期。小八字期和翻卷期的花粉附着力之间差异不显著(P>0.05),但花粉萌发率之间存在较大差异。(2)核桃不同授粉方式下,花粉在柱头上的萌发时间格局、花粉管生长延伸完成受精的时间格局存在极显著差异(P<0.01)。花粉在柱头上8~36 h完成萌发,其中人工辅助异花授粉所需时间最短(8 h),自然授粉所需时间最长(36h)。授粉后36 h,各授粉方式之间花粉萌发率差异不显著(P>0.05)。核桃花粉从萌发到完成受精至少需要10 d,其中人工辅助异花授粉所需时间最短。在授粉受精过程中,花粉管从柱头穿过引导组织所需时间最长,为76~108 h。授粉后240 h,人工辅助异花授粉花粉管长度占花柱长度的比例极显著高于人工辅助自花授粉(P<0.01),与自然授粉之间差异显著(P<0.05)。【结论】核桃大八字期柱头的花粉附着力最强,且可授性最强,为核桃最佳授粉期。人工辅助异花授粉比自然授粉、人工辅助自花授粉先形成受精核。 相似文献
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Branch scoring of ‘Rojo Brillante’ persimmon (Diospyros kaki) increased fruit size at harvest and caused a significant shift in the distribution of fruit diameters to the larger sizes, the response magnitude depending on the date of scoring. Scoring at the 75–77 growth stage of the BBCH-scale encouraged the development of fruit which grew faster, reached commercial colour, ripening and flesh softness earlier, and therefore was harvested earlier. Although fruit weight was significantly increased by scoring, the number of fruit was not modified and there was not a significant increase in yield. Fruit from trees scored at the onset of cell enlargement stage initiate ethylene production before fruit from unscored trees. Scoring did not modify following yield. 相似文献