共查询到17条相似文献，搜索用时 421 毫秒
1.
为探究华中樱桃 Cerasus conradinae种子生物学特性,以 湖北省赤壁市的野生华中樱桃的自然成熟未落地的果实为试验 材料,观察其种子形态,并测定种子长度、宽度、厚度、千粒 重、吸水特性和发芽特性。结果表明：华中樱桃种子为卵形,长 7.64±0.73mm,宽5.28±0.55mm,厚4.39±0.47mm,千粒重 62.77±2.91g,属中粒种子;种子浸种0~4 h吸水较快,后渐趋 缓,浸种24 h近饱和,吸水率为33.23%,种子饱和状态时吸水率 为33.30%;用750 mg/L 赤霉素（GA3）溶液浸种处理的种子发芽 效果较清水浸种好,但差异不明显,两者发芽率分别为65.3%和 62.7%;华中樱桃幼苗个体间差异大。 相似文献
2.
为探究华中樱桃种子萌发特性，提高华中樱桃萌发效率，本文以湖南省湘西自治州产当年生华中樱桃种子为材料，测定其长、宽、厚和千粒重；对种子采用不剥壳、剥壳、剥壳后破皮三种处理，测定其在不同处理下的吸水性能；用0、50、100、150、200 mg·L-15个浓度GA3溶液浸泡剥壳后种子和剥壳后破皮种子，对带壳种子用低温层积和交替变温层积处理，研究不同处理对华中樱桃种子萌发的影响。结果表明：(1)华中樱桃种子平均长7.34 mm,平均宽5.33 mm,平均厚4.30 mm,平均千粒重68.54 g。(2)华中樱桃种壳和种皮对种子吸水性能有不同程度的抑制作用，带壳种子、剥壳种子和剥皮后破皮种子分别在吸水32 h、50 h、52 h后达到吸水饱和状态，其饱和吸水率分别为34.31%、55.25%、63.85%。(3)剥壳加赤霉素处理可打破华中樱桃种子的休眠，剥皮后破皮种子在200 mg·L-1GA3溶液中浸种4 h后发芽率最高，为60.67%。(4)低温层积处理珍珠岩效果优于河沙，4℃珍珠岩层积90 d处理种子... 相似文献
3.
纳塔栎播种育苗试验 总被引：1，自引：0，他引：1
为了更好的研究纳塔栎的生长特性,特从美国易斯安那州引进种子进行种子育苗试验。通过种子检测发现,纳塔栎种子种子大小差异很大,单粒种子重5.09g~9.82g,平均百粒重为669.07g,种子长度为19.40mm~32.72mm,宽为17.05mm~22.39mm。试验结果表明,种子大小与当年生长量成正比,对发芽率无明显影响,发芽率均可达75%以上;湿砂层积贮藏可促进种子提早10d发芽。纳塔栎1年生播种苗高生长有2个高峰,分别出现在6月中旬和7月中旬,旬平均生长量均可达6.30cm以上;粗生长有1个大高峰和3个小高峰,其中最大峰值出现在8月上旬,旬平均生长量可达0.70mm以上。 相似文献
4.
厚朴不同种源及家系种子性状的变异 总被引：5，自引：0，他引：5
研究厚朴自然分布区内8个省份19个种源的种子长、种子宽、种子厚、种子长宽比及种子百粒重等性状的变异及趋变模式.结果表明:种源间种子长、种子宽、种子厚、种子长宽比等性状的差异均达到极显著水平;种源内不同家系种子长、种子宽、种子厚等性状的差异也均达到极显著水平;种源间种子百粒重变异远远高于种源内家系间变异,前者种子百粒重变异幅度为14.147～24.547 g,后者种子百粒重变异幅度为15.003～17.357 g;种子宽、种子厚和种子百粒重等性状受积温和热量因子控制作用极为明显. 相似文献
5.
黑果枸杞是一种抗旱、抗寒、抗盐碱、防风固沙的多年生灌木,也是一种常用的藏药植物,主要分布于我国西北部荒漠地区。由于受气候变化和人类活动的影响,野生种质资源受到破坏,目前人工选育的栽培品种极少。本试验以内蒙古、青海、甘肃、新疆等地5个不同种源黑果枸杞种子为供试对象,通过对其种子形态、大小、重量和萌发特性的研究,旨在为其应用开发和有效保护提供理论依据。结果表明:本试验所收集的不同种源黑果枸杞种子长、宽分别在1.5～2.2 mm和1.2～1.6 mm之间;不同种源黑果枸杞种子差异显著(P0.05),种子百粒重大小为:青海磴口额济纳新疆甘肃,在25℃培养条件下不同种源黑果枸杞种子萌发进程整体趋势一致,但萌发速率大小顺序为:青海、新疆甘肃、额济纳磴口;种子发芽率和发芽势大小顺序均为:新疆青海磴口额济纳甘肃。整体而言,青海种源黑果枸杞种子各方面指标表现最优。 相似文献
6.
比较分析棕黄色、棕红色和黑色3种颜色玛咖种子的大小、萌发特性、幼苗生长特性和酶活力,探讨3种颜色玛咖种子的表型性状及其与种子活力之间的相关性。结果表明,棕黄色和黑色种子的长、厚、厚宽比、千粒质量、发芽势、发芽率、发芽指数、活力指数、幼苗苗长、根长、单株鲜质量和干质量、POD活性、脱氢酶活性等性状之间无显著差异,但均显著高于棕红色种子(P<0.05);棕黄色和黑色种子的新鲜不发芽种子数、死种子数和不正常幼苗数均显著低于棕红色种子(P<0.05)。不同颜色玛咖种子的千粒质量与种子的长、厚存在显著正相关(P<0.05),种子发芽势、发芽率、发芽指数、活力指数均与千粒质量、POD和脱氢酶呈极显著正相关(P<0.01)。说明棕黄色和黑色种子活力高于棕红色种子,萌发能力更强。 相似文献
7.
为了研究黄檀种子的表型性状和发芽特性及幼苗生长量在不同种源间的差异,选取湖南新宁、吉首,江西庐山,安徽皇甫山等4个种源地的黄檀种子作为研究材料,测定其种子的长、宽、千粒重等指标,并通过发芽试验,分析不同种源地种子的发芽率及幼苗生长情况。结果表明:黄檀种子变异幅度为长8. 28～10. 63mm,宽4. 89～5. 16 mm,千粒重33. 11～52. 43 g。新宁种子最长,为10. 63 mm,千粒重最大,为52. 43 g;皇甫山种子最宽,为5. 16 mm;新宁种子发芽率最高,为68%;新宁幼苗株高最大,为7. 00 cm;新宁幼苗地径最大,为1. 67 mm。方差分析表明,不同种源间种子长、宽、千粒重有极显著差异;不同种源间种子的发芽率、幼苗株高、地径有极显著差异,且发芽率及幼苗生长量均与种子长、千粒重呈正相关。 相似文献
8.
以引进俄罗斯欧洲垂枝桦不同种源种子为材料,对不同种源种子形态及其萌发特性进行研究的结果表明:不同种源种子吸水量没有显著差异,而在种长、种宽、种厚、翅长、翅宽、千粒重、含水率、生活力、发芽率、发芽势和发芽指数存在显著差异;新西伯利亚种源种子最大、质量最重、发育最好、有生活力种子高达82.75%;采用混雪冷藏处理种子萌发能力最强,新西伯利亚种源种子发芽率、发芽势、发芽指数分别达到67.63%、55.41%、27.19;而对照种源采用低温冷藏处理种子萌发效果最差,其发芽率、发芽势、发芽指数分别为38.51%、32.42%、11.89。 相似文献
9.
朝鲜崖柏种子形态质量及萌发特性的初步研究 总被引：1，自引：0，他引：1
以吉林省长白县十五道沟采集的朝鲜崖柏种子为试验材料,利用超景深三维显微系统对其种子形态、千粒重进行了观察、描述和测定,探讨不同温度对种子萌发的影响,结果表明:朝鲜崖柏种子长2. 20~3. 80 mm、宽0. 96~1. 31 mm、厚0. 15~0. 84 mm,种翅长3. 63~5. 25 mm、宽0. 49~0. 90 mm,千粒重1. 174 1 g,朝鲜崖柏种子在相对湿度75%、温度25℃下萌发效果最好。 相似文献
10.
11.
以濒危树种极东锦鸡儿成熟种子为材料,研究极东锦鸡儿种子物理性状和温度对其种子萌发及幼苗生长的影响。结果表明:极东锦鸡儿种荚结实率较低,且约有1/4种子受虫害;成熟种子含水量为6.6%,千粒重18.6 g。种子长、宽和厚存在一定变异。种子长度平均为0.42 cm,宽度平均为0.27 cm,厚度平均为0.24 cm,长宽比为0.64。种皮透水性良好。不同温度条件对种子发芽率具有极显著影响。25℃条件下种子发芽率最高,为38.33%。随着温度的升高或降低,种子发芽率降低。发芽试验的第八天是计算种子发芽势的适宜时期。不同温度条件对极东锦鸡儿幼苗高度的影响极显著,对胚根长度影响显著。25℃有利于幼苗高度和胚根长度的增加,较高温度(30℃)有利于幼苗生物量增加。 相似文献
12.
厚朴(Magnolia officinalis Rehd. et Wils.)为木兰科(Magnoliaceae)落叶乔木.正品药用厚朴为厚朴的根皮、干皮和枝皮,其中的有效成分(厚朴酚(magnolol)、和厚朴酚(honokiol)及β-桉叶油醇等)具有多方面的药理作用(如燥湿消痰、下气除满),用于湿滞伤中、脱痞吐泻、食积气滞、腹胀便秘、痰饮喘咳等[1-4].厚朴主要分布于102NFA48122°E、22NFA4834°N之间,分布区内的不同气候及土壤条件,致使形成大量不同的遗传类型,其中种子形态必然存在很大的差异. 相似文献
13.
[目的]探讨不同种源家系岭南槭种子形态、种子萌发与幼苗生长的特性,分析它们与种源地地理气候因子之间的关系。[方法]对广东省岭南槭天然分布区的3个种源18个家系的种子表型性状、发芽特征、幼苗生长性状和叶色表现进行方差分析和相关性分析。[结果]表明:肇庆黑石顶(HSD)种源的种子最厚、最宽,深圳七娘山(QNS)种源的种子最薄、最窄,惠州南昆山(NKS)种源的种子最长,种子千粒质量最高;翅长与翅宽呈极显著正相关(P0.01),种子千粒质量与发芽率显著正相关(P0.05);岭南槭1年生幼苗地径与苗高成正比,幼苗生长受种源地的地理气候因子影响;在色彩表现方面,QNS3、QNS13家系的明度L*值较大,QNS13色相b*值显著高于其他家系,NKS14家系幼苗的色相a*值最大。[结论]种子千粒质量越高,发芽率越高;幼苗的地径苗高生长受种源地的地理气候因子影响。NKS14家系幼苗红叶特征最明显,色彩表现较好。 相似文献
14.
[Objective]To compare the differences of seed morphological characters among provinces of Quercus variabilis Bl.,and explore the adaptive growth status of seedlings growing in the central distribution area. [Method]The seeds of 6 Q. variabilis provenances from six provinceswerecollected, and the seedlings were cultivated and transplanted to experimental field in the centre of natural distribution range (Wuhan Jiufeng National Forest Park), then the seed morphology and one-year seedling growth traitswere surveyed. [Result](1)There were significantor extremely significantdifferences among provenances in seed length, seed width, seed length/width ratio and 100-seed mass, the order of seed length among provenances was Beijing Provenance (22.28 mm),Hubei Provenance (22.10 mm), He'nan Provenance (20.80 mm), Shaanxi Provenance (19.57 mm), Yunnan Provenance (18.93 mm)and Liaoning Provenance (18.81 mm), the seed width of Beijing Provenance (19.71 mm) and Hubei Provenance (19.16 mm) was higher than that of the others, the seed length/width ratio of He'nan Provenance (1.38) was extremely significantly higher than that of the others; (2)There were significant or extremely significant differences among provenances in seedling height, ground diameter, leaf number, branching number and seedling height/ground diameter, the Beijing Provenance and Hubei Provenance were better in seedling height and leaf number, which were respectively 19.54 cm and 20.26 cm, 8.32 leaves and 9.50 leaves; (3)A decreasing trend with time for seedling growth traits among provenances was found; (4)There was a positive relationship between seed morphological characters and seedling growth traits except seed length/width ratio; the leaf number was significantly related to ground diameter and branching number and the seedling height and leaf number were closely related to the seed morphological characters; (5)It showed a decreasing trend with the growth time in the relationship between seedling growth traits and 100-seed mass. [Conclusion]The seedlings of Beijing Provenance and Hubei Provenance grew better in the experimental field which might be related to their larger seed mass, and the Yunnan Provenance in the south margin and the Liaoning Provenance in the north margin of distribution area of Q. variabilis grew weaker than the provenances in the centre of distribution area.With the effect of climate change, provenances in the margin of distribution area may lose in the community competition in the seedling stage if it cannot take advantage of its dispersal and settlement and affected by the disadvantage of growth and competition, so that the distribution and population renewal would surely be affected. 相似文献
15.
Prunus cerasoides has poor regeneration in its natural habitat due to its hard seed coat. The information about maturity time of fruit/seed
is scanty and studies on seed germination enhancement lacking. In the present study, the main focus has been given to the
physical fruits/seeds attributes which are reliable indicators of maturity and seed pretreatments which help to enhance germination.
The fruits/seeds were collected from low and high elevational sites covering the altitudinal range of the species during the
period of fruit/seed development (last week of February–mid April) for two consecutive years (2003–2004). The change in fruit
colour from dark green to pale red or red was a useful indicator of seed maturity in P. cerasoides. Fruit moisture content between 46.57 ± 0.45% and 56.81 ± 1.14% and seed moisture content between 29.8 ± 1.35% and 34.13 ± 1.50%
coincided with maximum germination (41.11 ± 13.96% and 59.99 ± 12.05%) across sites. The removal of seed coat (mechanical
treatment) enhanced the germination of seeds to 70 ± 0% at low elevation and 100 ± 0% at high elevation in comparison of control
or untreated seeds (germination range between 5.83 ± 0.83% and 31.68 ± 25.02%). Positive correlation existed between seed
size and germination (r = 0.280; P < 0.01). 相似文献
16.
This study represents a geographical approach to morphological variation of cones, needles and seeds in natural dragon spruce
(Picea asperata Mast.) populations across western China and the relationship between morphological traits and weather variation for the origins
of populations. Significant differences were found for all cone, needle and seed traits among populations and trees within
populations. The coefficients of variation in 2 higher latitude populations were higher than those in other populations in
all traits except for needle width and seed width. Fairly high within-population variability was also detected for cone dry
weight, seed dry weight and needle traits in this study. Cone length, cone width, cone dry weight, seed scale length, seed
scale width and seed wing length were strongly positively intercorrelated. Seed length and seed dry weight showed a significantly
positive correlation with seed wing length. And needle width showed a significant negative correlation with cone traits, seed
scale length, seed wing length and seed length. The higher the annual mean temperature, the higher the average cone length.
This study also revealed a negative linear dependence on latitude: the higher the latitude, the lower the population average
seed length. Seed dry weight was positively and linearly related with altitude. 相似文献
17.
In this study, we assessed the variability in pod, seed traits and oil content of 24 accessions of Pongamia pinnata collected from different parts of the Andaman and Nicobar Islands, India. The experiment was conducted at the Central Agricultural Research Institute, Port Blair during 2010 to 2011. The variability studies for pod and seed traits revealed that, the accession CPT-6 collected from New Wandoor in South Andaman recorded the maximum values for eight traits viz. pod length （75.51 mm）, pod width （34.62 mm）, pod thickness （17.55 mm）, 100 pod weight （770.33 g）, seed width （21.23 mm）, 100 seed weight （377.00 g）, oil percentage （43.92%） and germination percentage （94.7%）. However, the maximum seed length （26.46 mm） was recorded from CPT 2 and the maximum pod-seed ratio was obtained from CPT 13 and CPT 4 （2.50 and 2.44 respectively）. The phenotypic and genotypic coefficients of variations were also close to each other for all traits, but the 100 pod and seed weight exhibited higher phenotypic and genotypic coefficient of variation than the other traits. Estimates of broad sense heritability ranged from 0.30 （for seed length） to 0.95 （pod length） and genetic ad- vance as percent of the mean ranged between 11.66% and 57.40% with seed length giving the lowest value and 100 pod weight giving the high- est value. Both the phenotypic and genotypic correlation between pod length, pod width, pod thickness, 100 pod weight, seed width and 100 seed weight and between pod thickness, 100 pod weight, seed width, 100 seed weight and germination percentage were found to be strong. On the basis of non hierarchical Euclidian cluster analysis, 24 accessions were grouped into six clusters. The maximum numbers of seven accessions were included in cluster VI. The maximum intra cluster distance （10.238）shown by cluster VI and the maximum inter cluster distance （17.021） between V and HI followed by III and II （15.942）. Among the six clus- ters formed the cluster III recorded maximum oil percentage, 100 pod weight, 100 seed ,weight, pod length, pod thickness, pod width, seed width and. germination percentage, while cluster V recorded maximum pod seed ratio and germination percentage. The present findings suggest that the crossing between accessions of cluster V and cluster III will result in a wide spectrum of variability in subsequent generations. 相似文献