共查询到20条相似文献,搜索用时 62 毫秒
1.
2.
广西蕨类植物研究(4) 总被引:2,自引:0,他引:2
<正> 本文记载广西蕨类植物新记录科1个、属8个、种11个及2个新分类群。文中引用标本除注明者外,其余均存广西农学院植物标本室(GXAC)。 水韭科Isoetaceae 广西新记录科,本科现仅存1属。 1.水韭属Isoetes L.,Sp. P1.2:1100.1753. (1)水韭 Isoetes sinensis Palmer in Amer.Fern Journ.17:112 cum f.1927;Chingin Sinensia 3:348。1933。中国高等植物图鉴 1:115,图230。1972。 广西北部:桂林,雁山,海拔200米,石灰岩,水田中,1952年11月11日,梁畴芬30688 相似文献
3.
加拿大国家农业部研究员、西安大略大学教授李宗霆博士(Dr.T.T.Lee)应安徽师范大学邀请于1987年9月26日至10月底来该校短期讲学。讲学专题为:(1)植物激素的作用机理和在农业上的应用:(2)吲哚乙酸的代谢和调节;(3)植物酚类物质;(4)钙和植物细胞功能;(5)植物组织培养——技术、现状和远景:(6) 相似文献
4.
猪獾(Arctonyx collaris)属经济动物,当地又称聋猪。1978年7月8日,在广西桂北兴安县苗儿山地区的华汇公社垌上大队的小崖头(海拔1,000米)捕到雄猪獾一只;1978年7月14日在垌上大队小岗岭(海拔850米)捕到雌猪獾一只;1978年7月26日和30日在高寨大队(海拔850米)捕到雌猪獾二只;7月20日捕到雄猪獾一只。其身长520—680毫米、后足长 相似文献
5.
6.
7.
8.
<正> 广西壮族自治区科学技术委员会下达给广西植物研究所承担的《建立广西珍稀濒危植物观察区技术研究》课题已完成研究任务和指标要求,于1993年6月2日经广西区科委委托,由广西科学院组织有关专家审查,通过鉴定。 该项目以1987年公布的《中国珍稀濒危保护植物名录》为依据,基本查清了产于广西的国家级珍稀濒危植物种质资源共有123种,隶于54科96属,占国家保护植物总数(389种)的31.62%,仅次于云南,居全 相似文献
9.
10.
11.
12.
Abscisic acid (ABA) causes the closure of stomata. By means of an infrared gas analyzer it was found that changes in the physiological status of Fragaria grandiflora Duch. cv. Red gauntlet, caused by pretreatment with exogenous ABA, decreased the sensitivity to the next dose of the hormone. A similar decrease of sensitivity to ABA may be obtained by shortening the light period. It is proposed that this decrease in sensitivity to ABA may be due to adaptation of guard cells to an excess of ABA. 相似文献
13.
林祁 《热带亚热带植物学报》1998,6(3):231-232
对国产青藤属3种植物作了补充和修订.报道短蕊青藤在广西和广东的新分布,大花青藤在四川的新分布;将小果青藤和柔毛青藤归入大花青藤,将绣毛青藤归入红花青藤。 相似文献
14.
15.
16.
The effect of 0–7.5 × 10−3 μmol abscisic acid (ABA) on the transpiration of strawberry ( Fragaria grandiflora Duch. ev. Red gauntlet), both under illumination and in darkness, was investigated with the use of an infrared gas analyser. Mathematical analysis of the results suggests that the decrease in transpiration after darkening can be described by a series of first-order processes with continuous distribution of rate constants k. Application of ABA makes the rate constant distribution narrower, so that one single rate constant occurs at the highest doses. ABA accelerates the decrease of transpiration more in darkness than under illumination. This suggests that the process of efflux of osmotically active particles from guard cells is influenced more than influx. For ABA doses greater than 7.5 × 104 μmol, the transpiration decreases in two stages, of which only the first one seems to be affected by ABA: but above this dose further acceleration of decay of transpiration after darkening is not observed. The observations may indicate that above this critical dose of ABA the rate determining step consists in guard cell wall relaxation rather than in efflux of osmotica. 相似文献
17.
大花栀子植物挥发物成分测定及其日变化分析 总被引:1,自引:0,他引:1
为探究大花栀子植物挥发物成分组成及其一天内早、中、晚的差异,采用热脱附气质联用技术对其进行香气成分的分析。结果表明:全天从其花朵中共鉴定出62种成分,主要为萜烯类、酯类、醇类物质,且不同时间其成分差异显著,如早、中、晚3个时间段,β-蒎烯相对含量分别为1.93%、1.69%、8.81%,顺式-β-罗勒烯分别为28.22%、4.35%、16.47%。3-蒈烯(3.45%)、异丁子香酚(0.21%)等只在早上检出;月桂烯(0.38%)、伞花烃(2.46%)等只在晚上检出;芳樟醇、金合欢烯等在早上和午间两个时间段相对含量较高,而在晚上却未检测出。从植物VOCs角度结合其日变化动态,为大花栀子园林配置及其综合开发利用提供理论依据。 相似文献
18.
Rachel E Cruttwell McFadyen Marie Vitelli Catherine Setter 《Australian Journal of Entomology》2002,41(4):321-323
Abstract The moth Euclasta whalleyi was introduced into Australia in 1988 for the biocontrol of its host plant, rubber vine Cryptostegia grandiflora , despite test results predicting it might also attack the related native vine Gymnanthera oblonga . Ten years after release, the moth is widespread and damaging on rubber vine, but there is no attack on G. oblonga , except when it is growing in close association with rubber vine plants. The implications of 'false positives' in host-specificity testing are discussed. 相似文献
19.
气相色谱/质谱法研究栀子花头香成分 总被引:9,自引:0,他引:9
The floral volatiles of Gardenia jasminodes vat. grandiflora were investigated by adsorption wire/GC/MS. As a result 86 compounds were separated and determined, which amount to 98.5% of the total volatiles. The main compounds were linalool, β-myrcene, methyl benzoate, L-limonene, ocimene, cis-3-hexenyl tiglate, cis-3-hexenylisovalerate, iso-amyltiglate, etc. 相似文献