Hygroscopic Movement of Polytrichum commune Hedw.var.commune Peristome in Karst Plateau,Guizhou Province,China

doi:10.7525/j.issn.1673-5102.2021.03.017

Abstract

Abstract:

The investigation of the peristome of vapour-wind dispersal type mosses were found sensitive to humidity. The structure of peristome changed at different humidity， which played an important role in the release of spores. The Polytrichum commune Hedw.var.commune of Karst plateau， Guizhou Province was selected as the research object， and the difference of the structure of peristome and the release rule of spore under the change of humidity were observed. In order to reveal the influence and function of the hygroscopic movement on the spore release. The results showed that： ①When the humidity was increased， the sizes of peristome structure and epiphragm were increased significantly， then recovered when the humidity dried again. The space between peristome increased significantly from 8.33 to 11.53 μm， and the area of epiphragm was increased by 20%. ②In the experiment of continuous wind blowing， the quantity of spores released during the initial period of the hygroscopic movement was increased significantly， then decreased with the recovery of the peristome structure， and kept at a very low quantity at last. As the humidity was increased， the percentage of cluster spores in the released spores was increased， and increased with the decrease of the released spores， and reached significant difference when the peristome structure recovered. ③The wind experiments were carried out at the dry stage， the initial stage of the hygroscopic movement and the peristome structure in the recovery stage respectively， the quantity of spores released at the initial stage of the hygroscopic movement was significantly higher than that at the dry and re-recovery stages of the peristome structure， however， when the structure of peristome was restored， the released quantity of spores was still higher than that of dry spores due to the increase of the percentage of cluster spores. Thus， the structure of P.commune Hedw.var.commune peristome changed during the hygroscopic movement， and when the structure of peristome was restored， the ability of releasing spores was still higher than that of drying， with positive significance to the spread and reproduction of this species.

Key words: the hygroscopic movement, peristome, epiphragm, cluster spores, Polytrichaceae

CLC Number:

Q914.84

Zhe-Qi ZHANG, Zhi-Hui WANG, Zhao-Hui ZHANG. Hygroscopic Movement of Polytrichum commune Hedw.var.commune Peristome in Karst Plateau,Guizhou Province,China[J]. Bulletin of Botanical Research, 2021, 41(3): 458-465.

References

1	高谦，曹同，付星.藓类植物传孢类型及其系统演化关系［J］.云南植物研究，2000，22（3）：268-276.
1	Gao X，Cao T，Fu X.Types of spore dispersal of mosses in relation to evolution system［J］.Acta Botanica Yunnanica，2000，22（3）：268-276.
2	Lazarenko A S.On some cases of singular behavior of the moss peristome［J］.The Bryologist，1957，60（1）：14-17.
3	Patterson P M.The aberrant behavior of the peristome teeth of certain mosses［J］.The Bryologist，1953，56（3）：157-159.
4	Schnepf E，Stein U，Deichgr?ber G.Structure，function，and development of the peristome of the moss，Rhacopilum tomentosum，with special reference to the problem of microfibril orientation by microtubules［J］.Protoplasma，1978，97（2）：221-240.
5	李芳，王智慧.喀斯特峰丛节齿藓类生态分布及其环境因子影响研究［J］.中国岩溶，2019，38（2）：243-251.
5	Li F，Wang Z H.Study on ecological distribution of Arthrodontae mosses and their environmental factors in karst peak-cluster are［J］.Carsologica Sinica，2019，38（2）：243-251.
6	李承义，王智慧，张朝晖，等.藓类蒴齿的发育、结构与功能研究进展［J］.西北植物学报，2019，39（10）：1892-1900.
6	Li C Y，Wang Z H，Zhang Z H，et al.Advances on the development，structure and function of moss peristome［J］.Acta Botanica Boreali-Occidentalia Sinica，2019，39（10）：1892-1900.
7	Johnson C.noteLaboratory.demonstration of peristome teeth movements［J］.The New Phytologist，1931，30（3）：218-219.
8	Koenig W D，Van Vuren D，Hooge P N.Detectability，philopatry，and the distribution of dispersal distances in vertebrates［J］.Trends in Ecology & Evolution，1996，11（12）：514-517.
9	Clark C J，Poulsen J R，Parker V T.The role of arboreal seed dispersal groups on the seed rain of a lowland tropical forest［J］.Biotropica，2001，33（4）：606-620.
10	Vekemans X，Hardy O J.New insights from fine-scale spatial genetic structure analyses in plant populations［J］.Molecular Ecology，2004，13（4）：921-935.
11	Dam N.Spores do travel［J］.Mycologia，2013，105（6）：1618-1622.
12	Pohjamo M，Laaka-Lindberg S，Ovaskainen O，et al.Dispersal potential of spores and asexual propagules in the epixylic hepatic Anastrophyllum hellerianum［J］.Evolutionary Ecology，2006，20（5）：415-430.
13	L?nnell N，Jonsson B G，Hylander K.Production of diaspores at the landscape level regulates local colonization：an experiment with a spore-dispersed moss［J］.Ecography，2014，37（6）：591-598.
14	Sundberg S.Spore rain in relation to regional sources and beyond［J］.Ecography，2013，36（3）：364-373.
15	Cullingham C I，Pond B A，Kyle C J，et al.Combining direct and indirect genetic methods to estimate dispersal for informing wildlife disease management decisions［J］.Molecular Ecology，2008，17（22）：4874-4886.
16	Thompson P M，Goodman S.Direct and indirect estimates of dispersal distances［J］.Trends in Ecology & Evolution，1997，12（5）：195-196.
17	周训军，林会.毕节森林公园：密林掩藏的岩溶美景［J］.森林与人类，2015，（9）：74-79.
17	Zhou X J，Lin H.Bijie Forest Park：a karst landscape hidden by dense forest［J］.Forest & Humankind，2015，（9）：74-79.
18	中国科学院中国孢子植物志编辑委员会.中国苔藓志第八卷灰藓目烟杆藓目金发藓目藻苔目［M］.北京：科学出版社，2004：88-261.
18	Editorial Board of the Chinese Academy of Sciences.Mosses of China Volume Eight Hypnobryales Buxbaumiales Polytrichales Takakiales［M］.Beijing：Science Press，2004：88-261.
19	Crum H A.The geographic origins of the mosses of North America’s eastern deciduous forests［J］.Journal of the Hattori Botanical Laboratory，1972，35：269-298.
20	Johansson V，L?nnell N，Sundberg S，et al.Release thresholds for moss spores：the importance of turbulence and sporophyte length［J］.Journal of Ecology，2014，102（3）：721-729.
21	Stoneburner A，Lane D M，Anderson L E.Spore dispersal distances in Atrichum angustatum（Polytrichaceae）［J］.The Bryologist，1992，95（3）：324-328.
22	Smith G L.A conspectus of the genera of Polytrichaceae［J］.Memoirs of the New York Botanical Garden，1971，21（3）：1-83.
23	Ingold C T.Peristome teeth and spore discharge in mosses［J］.Transactions of the Botanical Society of Edinburgh，1959，38（1-4）：76-88.
24	Vitt D H.Adaptive modes of the moss sporophyte［J］.The Bryologist，1981，84（2）：166-186.

[1]	WU Jin, ZHANG Zhao-Hui, WANG Zhi-Hui. Peristome Submicro Structure of Hypopterygium in Karst Tiankeng [J]. Bulletin of Botanical Research, 2020, 40(4): 481-489.
[2]	WANG Xiao-Rui;WANG Li-Bao;LI Min;ZHAO Jian-Cheng*. Peristome Morphology Characteristics of 16 Species of Family Pottiaceae and their Systematic Significance [J]. Bulletin of Botanical Research, 2013, 33(2): 129-133.
[3]	LI Li-Bo;ZHAO Jian-Cheng. Peristome Morphology of Bryum* Hedw. (Musci:Bryaceae) and Its Taxonomic Significance [J]. Bulletin of Botanical Research, 2009, 29(6): 651-658.
[4]	GUO Shui-liang, CAO Tong. APPLYING CANONICAL CORRESPONDENCE ANALYSIS TO STUDY NICHE DIFFERENTIATION OF SPECIES OF POLYTRICHACEAE IN CHANGBAI MOUNTAINS [J]. Bulletin of Botanical Research, 2000, 20(3): 286-293.