24小时热门版块排行榜

南方科技大学公共卫生及应急管理学院2025级博士研究生招生报考通知

返回列表

当前只显示满足指定条件的回帖，点击这里查看本话题的所有回帖

幽幽深谷竹

金虫 (著名写手)

应助: 24 (小学生)
金币: 562.1
帖子: 1359
在线: 262.5小时
虫号: 916765

[资源] 【软件】生物学专用词典安装包，读文献轻松啦!

各位注意了，本人最近得到一个词典软件安装包，是生物学专用的词典，很好用的！有了它，读英文文献就方便多了。翻译很专业，省了不少事呢。欢迎下载！麻烦大家记得评论哦。

[ Last edited by silicare on 2012-10-24 at 17:52 ]

回复此楼

» 本帖附件资源列表

欢迎监督和反馈：小木虫仅提供交流平台，不对该内容负责。
本内容由用户自主发布，如果其内容涉及到知识产权问题，其责任在于用户本人，如对版权有异议，请联系邮箱：xiaomuchong@tal.com
附件 1 : www.99pan.com_生物学词典软件生物易典bioedic2008·0·0·0·11.exe

2012-02-13 16:14:16, 2.69 M

» 本帖已获得的红花（最新10朵）

幽幽深谷竹

随意的飘雪

» 猜你喜欢

为什么蛋白质氨基酸测定大家都测17种? 已经有5人回复
《灰分记：我与坩埚的“灰烬”之恋》已经有3人回复
化学工程及工业化学论文润色/翻译怎么收费? 已经有60人回复
求助食品检验工（基础知识），中国劳动社会出版社电子版已经有5人回复
胶体几丁质的结晶度？已经有0人回复
诚挚招收全日制博士！！！中国农业科学院麻类研究所谭志坚研究员课题组招收博士已经有2人回复
三甲基羟乙基丙二胺的合成路线已经有5人回复

1楼2012-02-13 16:14:25

已阅回复此楼关注TA 给TA发消息送TA红花 TA的回帖

zheng~8804

木虫 (正式写手)

应助: 10 (幼儿园)
金币: 2348.6
帖子: 663
在线: 159.4小时
虫号: 1493200

★★★★★ 五星级,优秀推荐

The balansiaceous endophytes produce a diversearray of secondary metabolites. Several well-studiedtoxic syndromes may develop in mammals feeding onforage grasses colonized by species of Neotyphodiumor Epichloe¨ (Lane, Christensen & Miles 2000, Schardlet al. 2004). The toxic alkaloids include the anti-insectalkaloids peramine and lolines, and the anti-vertebratealkaloids lolitrem B and ergovaline (Schardl 2001).Whereas most of the metabolites are of fungal origin,there is evidence of biosynthetic interaction. Shelbyet al. (1997) found ergopeptide variants that wereapparently modified by plant metabolism. Justus, Witte
& Hartmann (1997) reported traces of loline even inuninfected plants of Festuca pratensis. Their chemistryand activity have been extensively reviewed and summarizedby Lane et al. (2000).Sincecolonisation of the host is primarily intercellular,the endophytes are dependent on nutrients ofthe apoplast for growth. As summarized by Bacon &White (2000), only a few studies deal with translocationand the specific physiology on nutrient exchange oraccumulation in vivo. For example, Schmid, Spiering &Christensen (2000) studied distribution and nutrition ofthe endophytes in planta. And more recently, Pan &Clay (2004) found that 14C movement from labelledleaves was greater for infected stolons than for those ofnon-infected plants. Studies on enzyme activities, concentrationsof amino acids, and ammonium, indicatethat the interaction significantly alters at least nitrogenmetabolism. Nevertheless, there may be an inducedplant defence reaction; Roberts et al. (1992) found thatendophyte-infected plants producedgreater amountsof chitinase than uninfected plants.Even though some balansiaceous endophytes contributenothing to the fitness of their hosts and mayeven be antagonistic (Sinclair & Cerkauskas 1996,Faeth & Fagan 2002, Sieber 2002, Schardl et al. 2004),their symbiosis with their hosts is widely accepted asbeing mutualistic (Schardl & Clay 1997). Physiologicalstudies (Schardl 2001) indicate that signals communicatingbetween E. festucae and host plants ensure adelicately balanced interaction between the partners.The primary benefits for the fungal partner are nutritional,but also include protection from abiotic stress(Bacon & Hill 1996), for example, desiccation, as wellas from competing epiphytic organisms (White et al.2000). The main advantage of the interaction forplants is presumably protection against herbivory bytoxic alkaloids produced in the symbiotic association.Additionally, the endophyte may mediate induced resistance,i.e. as an extension of the defensive mutualismhypothesis ; the activation of the host defence throughconstitutive and induced resistance (Bultman &Murphy 2000). The expectation of induced resistancein infected plants is strengthened by reports thatenvironmental stresses can stimulate the productionof mycotoxins in endophyte-infected plants (Bultman& Murphy 2000).