云南楼梯草属一新种

本文发表了作者最近在考察勐仑热带雨林时发现的楼梯草属一新种,勐仑楼梯草Elatostema menglunense。     

Four New Species of Elatostema (Urticaceae) From China

Four new species of the genus Elatostema are described. They are E. coriaceifolium W. T. Wang, E. glochidioides W.T.Wang,E. liboense W.T.Wang,and E. baiseense W. T. Wang     

不同采收期紫玉盘中抗癌活性的初步研究

对不同采收期紫玉盘植物提取物,采用SRB法观察其对人口腔上皮癌细胞株(KB)生长的影响进行抗癌活性检测,结果发现抗癌活性物质随采收期的不同其活性具有显著差异,10月份采收的紫玉盘植物提取物体外抗癌活性最强。     

Four New Species and One Variety of Elatostema (Urticaceae) from China

One variety, Elatostema bijiangense var. weixiense, belonging to sect. Weddellia ser. Crenata, one species, E.cucullatonaviculare, belonging to sect. Elatostema ser. Cuspidata, two species, E.luoi and E.heterogrammicum, belonging to sect. Elatostema ser. nanchuanensia, and one species, E.fugongense, belonging to sect. Elatostema ser. Albopilosa, are described as new from China.     

Taxonomic notes on some species of Elatostema (Urticaceae) from China

Elatostema bijiangense W. T. Wang, E. medogense W. T. Wang var. oblongum W. T. Wang, E. shuzhii W. T. Wang, E. obtusum Wedd. var. glabrescens W. T. Wang, E. sinense H. Schorter var. trilobatum W. T. Wang and E. strigulosum W. T. Wang var. semitripi-linerve W. T. Wang are reduced to synonymies.     

不同水分条件对人参榕生长和生理的影响

以3年生人参榕(Ficus microcarpa)为试材,采用盆栽调控水分的方法,研究5种不同的水分处理(基质最大含水量的90%～100%,70%～80%,50%～60%,30% ～ 40%和10%～20%)对人参榕生长和生理的影响,为栽培生产提供理论依据.结果表明:随着浇水量的减少,人参榕的株高、冠幅、块根增量均显著下降(P＜0.05);人参榕叶片的超氧化物歧化酶(SOD)、过氧化物酶(POD)活性显著增高(P＜0.05),细胞膜相对透性显著增强,脯氨酸和丙二醛(MDA)含量也显著增加;叶片净光合速率(Pn)和蒸腾速率(Tr)呈随浇水量的减少而显著降低;但叶片水分利用效率(WUE)呈显著增加趋势;各处理的叶片初始荧光(F0)和最大光量子效率(Fv/Fm)差异不显著.在各处理中,70%～80%的最大基质含水量的处理,其人参榕叶片的细胞膜相对透性最低,保护酶活性最弱,脯氨酸和丙二醛含量最低,净光合速率高,从而导致了人参榕具有生长最快、株高、冠幅和最大块根直径增量最大的特点.可见,70%～80%的最大基质含水量为是人参榕种植效果最好的水分管理模式.     

广东省榕树虫瘿蓟马种类及营瘿蓟马寄主专一性调查

2013年对广东地区榕树虫瘿中的蓟马种类进行了调查,共发现榕母管蓟马Gynaikothrips ficorum(Marchal)、榕管蓟马Gynaikothrips uzeli(Zimmerman)、榕端宽管蓟马Mesothrips jordani Zimmermann、拉马棘腿管蓟马Androthrips ramachandrai Karny和黄胫棘腿管蓟马Androthrips monsterae(Moulton)5种管蓟马科种类,其中黄胫棘腿管蓟马为中国新纪录种。榕母管蓟马和榕管蓟马为营瘿蓟马,诱导初始虫瘿具有寄主专一性,榕母管蓟马是细叶榕Ficus microcarpa初始虫瘿的诱导者,而榕管蓟马仅在垂叶榕Ficus benjamina Linn.上诱导形成虫瘿;但当两种榕树种植在一起时,榕母管蓟马和榕管蓟马偶尔会入侵到对方成熟虫瘿中并与之生活在一起。榕端宽管蓟马属于盗寄生种类,而拉马棘腿管蓟马和黄胫棘腿管蓟马主要捕食营瘿蓟马的幼体(包括卵、若虫和"蛹"),三者均为寄居性蓟马,无寄主专一性。     

Ficuschlorins A - D, lactone Chlorins from the leaves of ficus microcarpa

Four new lactone chlorins, ficuschlorins A – D ( 1 – 4 , resp.), and six known pheophytins were isolated from the leaves of Ficus microcarpa. The structures of these compounds were determined by 1D‐ and 2D‐NMR spectroscopy, and other techniques. New natural pheophytins were rarely obtained. In the past ten years, only three new pheophytins were isolated from natural sources.     

荨麻科楼梯草属三种植物花序的补充描述

楼梯草属的花序不但是反映该属进化趋势的重要器官之一,而且还是该属的属下划分及种间鉴定的关键性状。本文基于大量的有花标本研究,并参照模式标本及相关文献资料对该属的三种植物花序形态进行了补充描述。