维普中文期刊产品整合服务
557篇 您的检索式:作者名="DUCKETT"
    题名 作者 年代 出处 被引量
1Do motile spermatozoids limit the effectiveness of sexual reproduction in bryophytes? Not in the liverwort Marchantia polymorpha显示文摘To test the premise that fertilization distances in bryophytes are limited by spermatozoid motility, we measured the distances between over 80?000 male and female thalli of Marchantia polymorpha on heathland over 2 successive years after a major fire and recorded the incidence of sporophytes. The first comparative data on spermatozoid numbers per antheridium across bryophytes and pteridophytes were calculated from antheridial sizes and spermatid diameters and cross‐checked with the likely numbers produced by successive antheridial mitoses. Individual antheridia of Marchantia produce over 200?000 spermatozoids. Extrapolating from individual antheridia to the numbers of mature antheridia per antheridiophore and then to individual male plants, we calculated that a single flooding event on a male thallus with 10–12 antheridiophores will result in the release of over 50 million spermatozoids. Assuming radial dispersal in surface water films by lipids released from the dehiscing antheridia, spermatozoids can reach distances exceeding 20?m from the parent plants, in line with our finding of 100% fertilization in female plants of Marchantia up to 19?m from the nearest males, far beyond published fertilization distances in dioicous bryophytes. We attribute this to (i) much greater spermatozoid production and numbers in Marchantia than in other bryophytes and (ii) highly effective sperm transport both within the antheridiophores and archegoniophores via their overlapping scales and grooves in the stalks and between male and female thalli via surface water films. These features, coupled with the massive production of small spores, explain the success of Marchantia as the primary colonist of open habitats.Silvia Pressel Jeffrey G. Duckett 2019Journal of Systematics and Evolution2019,57,4:2
2Characterization of an Akt kinase inhibitor with potent pharmacodynamic and antitumor activity 显示文摘Rhodes N Heerding DA Duckett DR 2008Cancer Res2008,68,7:1
3Skin flap closure by dermal laser soldring:a wound healing model for sutureless hypospadoas repair显示文摘Kirsch AJ Duckett JW Snyder HM 1997Urology1997,50,:1
4Effect of cooking on the fatty acid composition of beef intramuscular lipid显示文摘Duckett SK Wagner DG 1998Journal of Food Composition and Analysis1998,11,4:1
5The island flap techinque for hypospadias repair显示文摘Duckett J W 1981Urol Chin North Am1981,8,:1
6Antenatal diagnosis and subsequentmanagement of hydronephrosis显示文摘Blyth B Snyder HM Duckett JW 1993J Urol1993,149,:1
7Suggested terminology for duplex syslems, ectopicureters and ureteroceles显示文摘Glassberg KI Braren V Duckett JW 1984J Urol1984,132,:1
8American Urological Association symptom index in the assessment of urethroplasty out- comes 显示文摘Morey AF McAninch JW Duckett CP 1998The Journal of Urology1998,159,4:1
9Transverse preputial island flap technique for repair of severe hypospadias显示文摘Duckett JJ 0,,:1
10Gametogenesis and fertilization in Pteridium 显示文摘Bell P R Duckett J G 1976Botanical journal of the linnean society1976,73,:1
11Comparison of ultrasound effect in different reactors at 20kHz 显示文摘Hepher M J Duckett D Loening A 2000Ultrasonics Sonochemistry2000,29,7:1
12Tubularized incised plate hypospadias curvature lead to more Onlay island flap procedures显示文摘Baskin L Duckett J Ueoka K 1994J Urol1994,151,5:1
13A prospective evaluation of cardiovascular magnetic resonance measures of dyssynehrony in the prediction of response to cardiac resynchronization therapy显示文摘Sohal M Duckett SG Zhuang X 2014J Cardiovasc Magn Reson2014,16,1:1
14Differential role for TLR3 in respiratory syncytial virus-induced chemokine expression显示文摘Rudd BD Burstein E Duckett CS 2005J Virol2005,79,6:1
15A computer vision system for appearance-based descriptive sensory evaluation of meals 显示文摘Munkevik P Hall G Duckett T 2007Journal of Food Engineering2007,78,1:1
16Modelling of the energy absorption by polymer composites upon ballistic impact显示文摘S.S Morye P.J Hine R.A Duckett D.J Carr I.M Ward 2000Composites Science and Technology2000,,14:1
17Transperineal ultra- sound to assess the effect of tension-free vaginal tape po- sition on flow rates 显示文摘Duckett J Basu M Papanikolaou N 2010Ultrasound Obstet Gynecol2010,36,3:1
18Pain after suburethral sling insertion for urinary stress incontinence显示文摘Duckett J Baranowski A 2013Int Urogynecol J2013,4,2:1
19A plea for standardized grading of vesicoureteral reflux显示文摘Duckett JW Bellinger MF 1982Eur Urol1982,8,2:1
20XIAP as a ubiquitin ligase in cellular signaling显示文摘Galb(a)n S Duckett CS 2010Cell Death Differ2010,17,1:1
返回顶部 每页显示:
共28页 首页 上一页 第1页 下一页 末页 /28 跳转

网站首页 | 关于我们 | 联系我们 | 产品服务 | 客服中心 | 广告服务 | 版权声明 | 网站联盟 | 友情链接 | 售卡网点

版权所有© 渝B2-20050021-1 渝公网安备 50019002500403号 违法和不良信息举报中心

互联网出版许可证 新出网证(渝)字10号 全国400电话 - 免长途话费