采自不同微生境的齿肋赤藓(Syntrichia caninervis)沙培植株生长与叶形态差异

doi:10.7522/j.issn.1000-694X.2014.00197

摘要/Abstract

摘要：

齿肋赤藓(Syntrichia caninervis)是古尔班通古特沙漠苔藓结皮层中的优势物种。本研究通过碎片撒播法,对采自不同微生境(灌丛下遮荫和灌丛间裸露地)的齿肋赤藓样品进行沙培试验,旨在探明采自不同微生境苔藓样品的沙培植株在生长和叶形态方面是否存在差异,以期为耐旱藓类样品的采集和人工培养提供一定参考。结果表明:(1)沙培植株盖度及密度呈显著差异,而生物量和株高则无显著差异。采自灌丛间裸露地的苔藓样品沙培植株的密度、盖度及生物量均高于灌丛下遮荫生境的样品,而株高的差别则相反。(2)采自灌丛间裸露地的样品沙培后的植株中部和底部叶片的宽度、顶部叶片的叶片毛尖长度均显著高于采自灌丛下遮荫样品沙培后的植株;而两生境的沙培藓株从顶部至底部的叶片长度及中肋宽度无显著差异。采自灌丛间裸露地样品的沙培植株具有更大的植株密度和盖度,且叶片顶部具有更长的毛尖,这些特征都与植株的抗旱性有关。因此,采自灌丛间裸露地齿肋赤藓沙培植株表现出较强的抗旱性。

关键词: 齿肋赤藓(Syntrichia caninervis), 形态特征, 沙培, 微生境

Abstract:

Syntrichia caninervis is the dominant species of moss crusts in the Gurbantunggut Desert, the largest fixed and semi-fixed desert in northwestern China. This species has a strong ability of desiccation-tolerant, making them the artificial cultivation sample used for fixing sand. However, the differences in growth and leaf morphological characters of sand-cultivated shoots of S. caninervis sampled from different microhabitats are poorly studied. In this study, the fragments of S. caninervis shoots collected from two different microhabitats including under shrub canopy (understory) and exposed spaces between shrubs (exposed intershrub) were separately cultivated on the same sand medium under laboratory conditions for fifty days. Growth parameters (coverage, density and shoot height) and leaf morphological characteristics (leaf width, leaf length, midrib width and leaf hair point length) of the seedlings were measured and compared. Results showed that: (1) there existed significant differences of shoot coverage and density between the two sampling microhabitats, but no significant difference was found on the shoots height or the biomass. Compared to the sand-cultural seedlings from understory, the value of shoots coverage, density and biomass of cultivated shoots from intershrub were higher, while the shoot height showed the opposite results. (2) There were significant differences among sand-cultural seedlings from different microhabitat in leaf width from middle and bottom of shoots, as well as the leaf hair point length from top of shoots. However, no obvious morphological differences in leaf length and midrib width were observed. The leaf width of middle and bottom sand-cultural seedlings from exposed intershrub were wider than those from understory, and the leaf hair point length also showed the same result. All the results indicated that the sand-cultured seedlings from exposed intershrub performed a better adaptation to extreme arid environment than those from understory after sand cultivation.

Key words: Syntrichia caninervis, morphological characters, sand cultivation, microhabitat

中图分类号:

Q944.3

许红梅, 尹本丰, 李进, 张元明. 采自不同微生境的齿肋赤藓(Syntrichia caninervis)沙培植株生长与叶形态差异[J]. 中国沙漠, 2015, 35(2): 373-379.

Xu Hongmei, Yin Benfeng, Li jin, Zhang Yuanming. Comparison of Growth and Leaf Morphological Characters of Sand-cultivated Shoots of Syntrichia caninervis Sampled from Two Different Microhabitats[J]. JOURNAL OF DESERT RESEARCH, 2015, 35(2): 373-379.

参考文献

[1] 吴玉环,程佳强,冯虎元,等.耐旱藓类的抗旱生理及其机理研究[J].中国沙漠,2004,24(1):25-31.
[2] 吴鹏程.苔藓植物生物学[M].北京:科学出版社,1998:32-37.
[3] 胡人亮.苔藓植物学[M].北京:高等教育出版社,1987:160-164.
[4] Mishler B D.Reproductive ecology of bryophytes[M]//Plant Reproductive Ecology:Patterns and Strategies,1988:285-306.
[5] Stark L R,Mishler B D,McLetchie D N.The cost of realized sexual reproduction:assessing patterns of reproductive allocation and sporophyte abortion in a desert moss[J].American Journal of Botany,2000,87(11):1599-1608.
[6] Newton A E,Mishler B D.The evolutionary significance of asexual reproduction in mosses[J].Journal of the Hattori Botanical Laboratory,1994,76:127-145.
[7] 王中生,安树青,方炎明.苔藓植物生殖生态学研究[J].生态学报,2003,11:2444-2452.
[8] 吴玉环,黄国宏,高谦,等.苔藓植物对环境变化的响应及适应性研究进展[J].应用生态学报,2001,06:943-946.
[9] Krassilov V A,Schuster R M.Paleozoic and Mesozoic fossils[J].New Manual of Bryology,1984,2:1172-1193.
[10] 赵小艳.沙地与黄土丘陵区生物结皮层三种优势藓类植物繁殖生长与生理特性比较研究[D].内蒙古通辽:内蒙古师范大学,2011.
[11] Stark L R,McLetchie D N,Mishler B D.Sex expression,plant size,and spatial segregation of the sexes across a stress gradient in the desert moss Syntrichia caninervis[J].The Bryologist,2005,108(2):183-193.
[12] 丁一汇,王守荣.中国西北地区气候与生态环境概论 [M].北京:气象出版社,2001.
[13] 赛胜宝.内蒙古北部荒漠草原带的严重荒漠化及其治理[J].干旱区资源与环境,2001,(4):34-39.
[14] 安守芹,于卓.四种固沙灌木苗期抗热抗旱性的研究[J].干旱区资源与环境,1995,(1):72-77.
[15] 张元明,王雪芹.准噶尔荒漠生物结皮研究[M].北京:科学出版社,2008.
[16] Zhang Y M,Wang H L,Wang X Q,et al.The microstructure of microbiotic crust and its influence on wind erosion for a sandy soil surface in the Gurbantunggut Desert of Northwestern China[J].Geoderma,2006,132(3):441-449.
[17] 徐杰,白学良,田桂泉,等.腾格里沙漠固定沙丘结皮层藓类植物的生态功能及与土壤环境因子的关系[J].中国沙漠,2005,25(2):92-100.
[18] 郑云普,赵建成,张丙昌,等.荒漠生物结皮中藻类和苔藓植物研究进展[J].植物学报,2009,(3):371-378.
[19] 朱瑞良,王幼芳,熊李虎.苔藓植物研究进展1..我国苔藓植物研究现状与展望[J].西北植物学报,2002,(2):236-243.
[20] Jones P R,Rosentreter R.Gametophyte fragment growth of three common desert mosses on artificial and natural substrates[J].The Bryologist,2006,109(2):166-172.
[21] 陈彦芹,赵允格,冉茂勇.黄土丘陵区藓结皮人工培养方法试验研究[J].西北植物学报,2009,(3):586-592.
[22] 聂华丽,吴楠,梁少民,等.不同沙埋深度对刺叶墙藓植株碎片生长的影响[J].干旱区研究,2006,(1):66-70.
[23] Reynolds L A,Nicholas McLetchie D.Short distances between extreme microhabitats do not result in ecotypes in Syntrichia caninervis[J].Journal of Bryology,2011,33(2):148-153.
[24] 魏美丽,张元明.脱水对生物结皮中齿肋赤藓光合色素含量和叶绿体结构的影响[J].中国沙漠,2010,30(6):1311-1318.
[25] 张立运,陈昌笃.论古尔班通古特沙漠植物多样性的一般特点[J].生态学报,2002,(11):1923-1932.
[26] 张元明,潘惠霞,潘伯荣.古尔班通古特沙漠不同地貌部位生物结皮的选择性分布[J].水土保持学报,2004,(4):61-64.
[27] 张元明,陈晋,王雪芹,等.古尔班通古特沙漠生物结皮的分布特征[J].地理学报,2005,(1):53-60.
[28] 钱金波,马明国.基于数码照片的狼毒盖度估算[J].地球科学进展,2009,(7):776-783.
[29] 尹建道,赵俊英,葛艳辉,等.数码技术在水培植物根系动态监测中的应用[J].东北林业大学学报,2009,(7):71-74.
[30] 张元明,曹同,潘伯荣.干旱与半干旱地区苔藓植物生态学研究综述[J].生态学报,2002,(7):1129-1134.
[31] 杨武.藓类植物适应环境的形态结构及生理学机制[D].浙江金华:浙江师范大学,2008.
[32] Walker L R,Thompson D B,Landau F H.Experimental manipulations of fertile islands and nurse plant effects in the Mojave Desert,USA[J].Western North American Naturalist,2001,61(1):25-35.
[33] Kappen L.Ecological significance of resistance to high temperature[M]//Lange O L,Nobel P S,Osmond C B,et al.Physiological Plant Ecology I.Berlin,Germany:Springer,1981:439-474.
[34] Eldridge D.Ecology and management of biological soil crusts:recent developments and future challenges[J].The Bryologist,2000,103(4)742-747
[35] Stark L R,McLetchie D N.Gender-specific heat-shock tolerance of hydrated leaves in the desert moss Syntrichia caninervis[J].Physiologia Plantarum,2006,126(2):187-195.
[36] Bowker M A,Stark L R,McLetchie D N,et al.Sex expression,skewed sex ratios,and microhabitat distribution in the dioecious desert moss Syntrichia caninervis (Pottiaceae)[J].American Journal of Botany,2000,87(4):517-526.
[37] 徐杰,白学良,哈斯巴根,等.鄂尔多斯地区不同生境类型对苔藓植物多样性和丰富度的影响[J].内蒙古师范大学学报(自然科学汉文版),2007,(1):98-103.
[38] Schmalholz M,Granath G.Effects of microhabitat and growth form on bryophyte mortality associated with leaf litter burial in a boreal spruce forest[J].Journal of Vegetation Science,2014,25(2):439-446.
[39] Hespanhol H,S neca A,Figueira R,et al.Microhabitat effects on bryophyte species richness and community distribution on exposed rock outcrops in Portugal[J].Plant Ecology & Diversity,2011,4(2/3):251-264.
[40] Schofield W B.Ecological significance of morphological characters in the moss gametophyte[J].The Bryologist,1981,84(2):149-165.
[41] Robinson S A,Turnbull J D,Lovelock C E.Impact of changes in natural ultraviolet radiation on pigment composition,physiological and morphological characteristics of the Antarctic moss,Grimmia antarctici[J].Global Change Biology,2005,11(3):476-489.
[42] Scott G A M.Desert bryophytes[M]//Grime J M.Bryophyte Ecology.Netherlands:Springer,1982:105-122.
[43] 王勋陵,王静.植物的形态结构与环境[M].兰州:兰州大学出版社,1989.
[44] 王虹,阿布都拉·阿巴斯,范兆田,等.四种旱生藓类植物的比较结构学观察[J].云南植物研究,2000,(1):38-40,119-120.
[45] 陈军,朱杰英,陈功锡,等.尖叶拟船叶藓居群叶形态变异的初步研究[J].生命科学研究,2002,(4):367-370.
[46] 郑云普,赵建成,张丙昌,等.荒漠藓类结皮层中齿肋赤藓形态结构适应性及其原丝体发育特征[J].中国沙漠,2009,29(5):878-884.
[47] 陶冶,张元明,吴楠,张丙昌.生物结皮中齿肋赤藓叶片毛尖对植株含水量及水分散失的影响[J].干旱区地理,2011,(5):800-808.
[48] 吴楠,魏美丽,张元明.生物土壤结皮中刺叶赤藓质膜透性对脱水、复水过程的响应[J].自然科学进展,2009,(9):942-951.
[49] 陶冶,张元明.叶片毛尖对齿肋赤藓结皮凝结水形成及蒸发的影响[J].生态学报,2012,(1):7-16.
[50] Tao Y,Zhang Y M.Effects of leaf hair points of a desert moss on water retention and dew formation:implications for desiccation tolerance[J].Journal of Plant Research,2012,125(3):351-360.
[51] 祁娟.披碱草属(Elymus L.)植物野生种质资源生态适应性研究[D].兰州:甘肃农业大学,2009.