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1.
本文报道采自贵州的轮藻植物，计有4个新种(平滑丽藻Nitella rasilis sp．nov., 沼泽丽藻N．
paludosa sp．nov.，拟乳突丽藻N．pseudopapillata sp．nov． 贵州丽藻N．guizhouensis sp．nov．)；
1个新变种(奇异丽藻疏枝变种N．mirabilis var. libera var. nov.)；3个新记录(笔状丽藻N．peni-
cillata Braun缅甸轮藻Chara burmanica Pal，普生轮藻裸枝变种C．vulgaris var. gymnophylla (A．
Br.) Nyman)， 而拟松形轮藻 C. pseudohydropitys Imahori为大陆首次发现。 相似文献
2.
本文报道了产自湖南省的轮藻1新种、4新变种、 5个亚洲新记录和8个中国新
记录：四盾轮藻Chara quadriscutula sp．nov., 布氏轮藻柱孢变种 C．braunii Gmelin var．
cylindrospora，var．nov., 松形轮藻湖南变种 C．hydropitys var．hunanensis，var．nov., 腋球丽
藻二型变种 Nitella axilliformis Imahori var．biformis var． nov．, 小果丽藻单果变种N．
microcarpa Braun var．unicarpa，var．nov．以及小果丽藻N．microcarpa Braun，细枝丽藻 N．
leptoclada Braun，安氏丽藻N．annandalei Pal，疏丝丽藻N.confervacea A Braun, 细形丽
藻N．gracilliformis J. Groves，倒置丽藻N．inversa Imahori，武藏丽藻N.musashiensis Mo-
rioka，稀脊丽藻N．paucicostata T. F. Allen，尖头丽藻戈尔梅变种 N． acuminata var．
gollmeriana(A．Br．)Zanev．＆ R．D. Wood，博尔德鸟巢藻Tolypella boldii Sawa，长枝轮
藻Chara longifolia Robinson，匹斯汀轮藻C．pistianensis J．Vilhelm 和格氏轮藻 C.grovesiiPal。 相似文献
3.
松杉类裸子植物的大孢子叶球理论评述 总被引：1，自引：0，他引：1
系统评述了迄今为止在裸子植物球果类种鳞形态学本质方面存在过的各种观点及研究进展。将
这些观点归纳为7大类：(1)Delpino和Penzig等主张种鳞为叶性器官的叶性说；(2)Sachs和Eichler认为种鳞相当于叶舌的叶舌说；(3)Bessey认为种鳞不过是胚珠合点端增生的结果的独特结构说；(4)Kubart等提出生胚珠构造的假种皮学说；(5)Arber的半枝学说；(6)Dupler的珠被说认为红豆杉类胚珠的肉质化部分为珠被性质的构造；(7)由Schleiden和Braun提出并由Florin等发展的枝性说则以充分的证据论证了种鳞的枝性本质。关于球果类裸子植物种鳞的性质和来源，本文作者赞同Florin枝性本质的论述；但对该构造现存式样的组成和演化过程，笔者认为该构造是在个体发育中不甚分化的专营生殖的枝性复合构造，由早期裸子植物次级生殖枝及其相关构造经过系统发育变态、融合演化形成。 相似文献
4.
本文对我国东北产6种藓类的孢子母细胞减数分裂中期I的染色体数进行了报道。结果如下：
羽枝青藓Brachythecium plumosum （Hedw．)B．S．G．，n=15；钝叶绢藓Entodon obtusatus(Mitt)
Jaeg．，n=11；东亚绢藓E．okamurae Mitt,n=11；丛本藓Anoctangium aestivum(Hedw．)Mitt．，
n＝13；真藓Bryum argenteum Hedw．，n=10；尖叶美喙藓Eurhynchium eustegium(Besch．)Dix.,n=20+2m，其中前三种为首次报道。 相似文献
5.
本文以藓类植物的幼嫩孢蒴为材料，对秦岭地区14种藓类植物的染色体作了观察，并对其中的长尖提灯藓进行了核型分析。结果如下：细叶真藓Bryum capillare L.ex Hedw．n＝10；长尖提灯藓Mnium lycopodioides Schwaegr．n＝6，核型公式为n＝6＝3m+3sm(1SAT)侧枝匍灯藓Plagiomnium maximoviczii(Lindb．)T．Kop．n＝6；梨蒴珠藓皱叶变种Bartramia pomiformis var．elongata Turn. n=10+2m；细枝羽藓Thuidium delicatulum (Hedw.) Mitt. n=11；尖叶羽藓Thuidium philibortii Limpr. n=10+1m；褐黄水灰藓Hygrohypnum ochraceum (Wils.) Loesk. n=10；钩枝镰刀藓Drepanocladus uncinatus (Hedw.) Warnst. n=7+3m； 黄叶细湿藓Campylium chrysophyllum (Brid.) J. Lange. n=10；林地青藓Brachythecium starkei (Brid.) B. S. G. n=16；多褶青藓 Brachythecium buchananii (Hook.) Jaeg. n=6；扁枝小锦藓Brotherella yokohamae (Broth.) Broth. n=9+2m； 粗枝藓Gollania neckerella (C. Mull.) Broth. n=7； 暖地金发藓, Pogonatum fastigiatum Mitt. n=7；其中粗枝藓和扁枝小锦藓的染色体数尚未见报道；林地青藓和多褶青藓的染色体数与所见报道的结果不同：其余10种与前人报道的结果一致。 相似文献
6.
本文根据我国薯蓣属(Dioscorea L．)根状茎组(Sect. Stenophora Uline)的外部形态特征、细胞染色体数、花粉形态、植物化学成分、地理分布等的规律，证明根状茎组是该属中的一个比较原始的自然类群：1．具横走的多年生地下根状茎，其它组是一年生或多年生的块茎；2．大部分是2倍体，其它组是多倍体；3．花粉粒单沟型，外壁纹饰网纹或颗粒条纹，其它组为双沟型，外壁纹饰网纹；4．含甾体皂甙元(steroidal sapogenin)，其它组不含。
我们的研究观察证明，N．N．TepaCNMeHKO根据R.Knuth系统(1924)提出的薯蓣皂甙元在该属中无分布规律的说法是无充分依据的。
本文讨论了某些组或种的划分及系统位置：取消sect.Illigerestrum Prain et Burk.；将马 肠薯蓣(D．simulans Prain et Burk．)改属根状茎组；触丝薯蓣(D．tentaculigera Prain et Burk.)应列入顶生翅组 (Sect．shannicorea Prain et Burk．)， 并提出了盾叶薯蓣 (D. zingiberensis Wright)和穿龙薯蓣(D．nipponica Makino)种的划分和定名的意见。 相似文献
7.
本文提出了龙胆属两个种的新名称(Gentiana membranulifera T．N．Ho,G．nudicaulisKurz var. assa-
mensis T．N．Ho)和5个变种的新组合[(Gentiana lateriflora Hemsl．var. uncifolia(H．J．Lam)T．N．Ho,
G．sumatrana Ridl．var．humifusa(S．Moore)T．N．Ho,G. quadrifaria Bl．var．wightii(Kusnez．)T．N．Ho,
G．loerzingii Ridl. var．timida(Kerr)T．N．Ho,G．membranulifera T．N．Ho var．recurvata (Kusnez．)T．N．Ho)〕。 相似文献
8.
七子花小孢子发生和雄配子体发育的研究 总被引：1，自引：0，他引：1
报道了七子花(Heptacodium miconioides)小孢子的发生及雄配子体形成的过程，主要结果如下：七子花的花药壁有7～10层细胞，药室内壁有带状加厚现象，变形绒毡层；小孢子母细胞减数分裂时的胞质分裂为同时型；四分孢子有四面体形和左右对称形两种；成熟花粉粒为三细胞型；小孢子发生和雄配子体形成过程存在败育现象。 相似文献
9.
Norman K. B. ROBSON 《中国科学院研究生院学报》2005,1(4):271-277
描述了中国云南北部的金丝桃属Hypericum L.(藤黄科)两个新种,即楚雄金丝桃H. fosteri N. Robson和漾濞金丝桃H. wardianum N. Robson。二者均与短柱金丝桃H. hookerianum Wight &; Arn.相近。楚雄金丝桃为一地方特有种,目前仅在模式地点发现;漾濞金丝桃在缅甸东北部还有分布。二者主要以蒴果伸长,非卵状近球形,萼片无中脉而有别于短柱金丝桃。此外,将宽萼金丝桃H. latisepalum (N. Robson) N. Robson从亚种提升为种;将变异较大的纤枝金丝桃H. lagarocladum N. Robson划分为两个亚种,即叶较宽、具有开张习性的原亚种纤枝金丝桃H. lagarocladum ssp. lagarocladum和叶较窄、更为直立的新亚种狭叶金丝桃H. lagarocladum ssp. angustifolium N. Robson。 相似文献
10.
刺五加Eleuthercoccocus senticosus (Rupr．et Maxim．)Maxim．具有花丝长度不同的三种植株类型，本文报道了其花序和花的形态结构，开花式样，异长雄蕊现象及相应的花柱长度。结果表明：长花丝长3．96～4. 44mm ，短花丝长0．45～0．93mm，中花丝长2．16～3．08mm。伴随异长雄蕊特征的其它表现在于花药大小、花药形状和颜色、花粉大小、花粉数量、柱头宽度和雌雄蕊育性。其中，长花丝对应的花药饱满、白色、花粉量大、花柱较短、雌性败育；短花丝对应的花药小、黄褐色、无花粉、花柱较长、雌性可育；中花丝对应的花药中等、花粉粒较大、雄性半不育、雌性可育。据此，刺五加被认为是单全异株的，其长花丝类型是雄性、短花丝类型是雌性、中花丝类型是两性的。另外，对三种性别形态类型的关系进行了讨论，并认为将雌株作为变种“短蕊刺五加”var.brevistaminea 显然是不恰当的。 相似文献
11.
傅华龙 《中国科学院研究生院学报》1991,29(5):479-480
In this paper a new species of Nitella, N. vermiformis, from Sichuan is reported. The
new species is the similar to Nitella procera Han from Yunnan. But gametangia of the latter
grow in every furcte, and fertile branchlets are similar to sterile ones. There are not central
radial branchlets and accessory branchlets in first furcate branchlet; the membrane ofoospore is vermiform-processed. 相似文献
12.
李尧英 《中国科学院研究生院学报》1988,26(4):322-328
Reported in this paper are two new species, one new variety, and three new re-
cords of the Characeae collected in China. They are Nitella anhuensis sp. nov., Chara pauci-
carpa sp. nov., Nitella alleninda var. tenuireticulata var. nov., N. gracilliformis J. Grove., N.
formosa T. F. Allen and Chara tenuispina A. Br. 相似文献
13.
杨积高 《中国科学院研究生院学报》1994,32(4):378-379
In this paper, a new species, a new variety and a new record for china of Navicu-
la from Anhui Province are reported. They are Navicula anhuinsis sp. nov. and N. muticaKütz. var. sinica var. nov. and N. mutica var. stigma Patrick. 相似文献
14.
本文报道了轮藻科2新种、1新变种、5个中国新记录：嫩江丽藻Nitella nenjiangensis sp.
nov.,轮苞轮藻 Chara vertillibracteata sp. nov., 球状轮藻北京变种 Chara globularis Thuiller
var. beijingensis var. nov., 腋生丽藻 Nitella axillaris Braun, 卷曲丽藻N. crispa Imah.,柔细
丽藻N. gracillima Allan, 拟扇形丽藻不完全变种N. pseudoflabellata var. imperialis,阿鲁轮藻
Chara arrudensis Mendes. 相似文献
15.
Apostasioideae, a small subfamily of Orchidaceae, is largely distributed in tropical
Asia with its northern limit extending to the Ryukyu Islands and south China. The first Chinese
species of this subfamily was reported by E. D. Merrill (1927) based on a specimen collected
from Hainan (McClure 9519, AMES), which he regarded as Apostasia wallichii R. Br. As
later labelled by E. F. de Vogel, it is in fact identical with A. odorata Bl., a widespread spe-
cies also found in southern Guangdong, Guangxi and Yunnan of China. It was not until re-
cently that the true A. wallichii was collected from southwestern Yunnan bordering on Burma,
which is initially reported here. In addition, an interesting new species, A. ramifera S. C. Chen
et K. Y. Lang, is described from Hainan.
The only Chinese species of Neuwiedia has long been known as N. veratrifolia Bl. (of.
Iconographia Cormophytorum Sinicorum 5: 602, t. 8034. 1976, and Flora Hainanica 4 180, t.
1078. 1977), which, however, was considered by de Vogel (1969) to be not found in China. In
de Vogel's revision, no Chinese taxon but a variety, N. zollingeri Rchb. f. var. singapureana
(Baker) de Vogel, is cited with some doubt based on a specimen of Hainan (F. C. How 73122,
in young fruit, AMES). N. zollingeri var. singapureana is in fact quite different from N.
veratrifolia by having glandular hair, much shorter inflorescence and flattened filaments. As
recently pointed out by de Vogel and G. Barretto (in Journ. Taiwan Museum 37: 78. 1984),
the plants found in Hongkong, as well as those in Guangdong and Yunnan, possess glandular
hair and short inflorescence. They are identical with the Vietnamese species N. balansae Gagnep.,
which was reduced by de Vogel to a synonym of N. zollingeri var singapureana. E. F. de
Vogel's suggestion seems to be acceptable except the varietal rank. It is treated here as a se-
parate species, N. singapureana (Baker) Rolfe, according to its fruit and hair characters. Thus
we have altogether one species of Neuwiedia and three species of Apostasia in China, including a new species and a newly recorded one. 相似文献
16.
薛嘉榕 《中国科学院研究生院学报》1991,29(3):274-275
A new species of the genus Neosinocalamus Keng f., N. yunnanensis, is described in this paper. 相似文献
17.
高蕴璋 《中国科学院研究生院学报》1985,23(4):311-314
Sonneratia, a small genus of Sonneratiaceae, is widely distributed throughout
SE. Asia, E. Africa and N. Australia, extending from 18˚S. to 20˚N. and from 45˚ to
150˚E. In China it occurs only in the Hainan Island. In this paper, two new sections areproposed and six species are recognized, of which one is described as new. 相似文献
18.
Yang Gao Feng Zhou Philippe Ciais Chiyuan Miao Tao Yang Yanlong Jia Xudong Zhou Butterbach-Bahl Klaus Tiantian Yang Guirui Yu 《国家科学评论(英文版)》2020,7(2):430
In the past three decades, China has built more than 87 000 dams with a storage capacity of ≈6560 km3 and the total surface area of inland water has increased by 6672 km2. Leaching of N from fertilized soils to rivers is the main source of N pollution in China, but the exposure of a growing inland water area to direct atmospheric N deposition and N leaching caused by N deposition on the terrestrial ecosystem, together with increased N deposition and decreased N flow, also tends to raise N concentrations in most inland waters. The contribution of this previously ignored source of N deposition to freshwaters is estimated in this study, as well as mitigation strategies. The results show that the annual amounts of N depositions ranged from 4.9 to 16.6 kg · ha−1 · yr−1 in the 1990s to exceeding 20 kg · ha−1 · yr−1 in the 2010s over most of regions in China, so the total mass of ΔN (the net contribution of N deposition to the increase in N concentration) for lakes, rivers and reservoirs change from 122.26 Gg N · yr−1 in the 1990s to 237.75 Gg N · yr−1 in the 2010s. It is suggested that reducing the N deposition from various sources, shortening the water-retention time in dams and decreasing the degree of regulation for rivers are three main measures for preventing a continuous increase in the N-deposition pollution to inland water in China. 相似文献