doi:

DOI: 10.3724/SP.J.1142.2013.60555

Plant Science Journal (植物科学学报) 2013/31:6 PP.555-561

New Observations on the Morphology and Structure of Marchantia polymorpha Gametophores in Sexual Reproduction Adaption


Abstract:
The morphology and structure of the gametophores of the liverwort Marchantia polymorpha were studied using light microscopy. New observations included:(1) The gametophores had distinct dorso-ventral differentiation and were highly specialized upright branches of the thallus bearing sex organs.(2) Two marginal ones of 9-11 rays of the female receptacle were distinguished by their slightly different sizes compared with others. There was no involucre between the two marginal ones. The dorsal region of the archegoniophore stalk was comprised of photosynthetic tissue,which extended laterally and formed two narrow grooves under the extended photosynthetic tissue. The ventral region of the stalk consisted of two-parallel rhizoid furrows half-wrapped by overlapping scales. (3) In contrast to the female archegoniophore,the antheridiophore stalk was smooth and no photosynthetic tissue or grooves were formed in the dorsal region. The umbrella-shaped female receptacle retained water,which could be released slowly along the grooves to form a tiny water flow,through which the spermatozoids swam to the archegonia. The morphology and structure of the Marchantia receptacles were adaptations to sexual reproduction,and can help us to understand the mechanism of fertilization in Marchantia.

Key words:Marchantia polymorpha,Gametophore,Antheridiophore,Archegoniophore

ReleaseDate:2015-04-15 13:22:52



[1] Durand E J. The development of the sexual organs and sporogonium of Marchantia polymorpha [J]. Bull Torrey Bot Club,1908,35(7):321-335.

[2] Bao W M,Chen F S. Culture and observations of Marchantia polymorpha [J]. Bull Biol,1982,17(1):19-21.

[3] Cao J G,Wang G,Wang Q X. Microstructural observations and cytochemical studies on the archegonial development and oogenesis of Mar-chantia polymorpha[J]. Plant Sci J,2011,29:607-612.

[4] Cao J G,Wang G,Dai X L,Wang Q X. Ultrastructural observation and cytochemical analysis of oogenesis in Marchantia polymorpha L.[J]. Plant Sci J,2012,30:476-483.

[5] Kreitner G L. Influence of the multilayered structure on the morphogenesis of Marchantia spermatids [J]. Amer J Bot,1977,64(1):57-64.

[6] Zinsmeister D D,Carothers Z B. The fine structure of oogenesis in Marchantia polymorpha [J]. Amer J Bot, 1974. 61(5):499-512.

[7] Smith G M.Cryptogramic Botany Vol.Ⅱ [M]. New York,Toronto,London:McGraw Hill Book Co,1955.

[8] Institute of Botany,Chinese Academy of Sciences. Iconographia Cormophytorum Sinicorum Tomus Ⅰ[M]. Beijing:Science Press,1972.

[9] Andersen E N. Morphology of sporophyte of Marchantia domingensis [J]. Bot Gazette,1929,88(2):150-166.

[10] Andersen E N. Discharge of Sperms in Marchantia domingensis [J]. Bot Gazette, 1931,92(1):66-84.

[11] Charles R B. Land W J G. Bryological papers.Ⅰ. The origin of air chambers [J]. Botanical Gazette,1907,44(3):197-213.

[12] Haupt A. W. Plant Morphology [M]. New York:McGRAW-Hill Book Company,INC,1953.

[13] O'Hanlon M E. Germination of spores and early stages in development of gametophyte of Marchantia polymorpha[J].Bot Gazette, 1926, 82(2):215-222.

[14] Voth P D. Gemmae-cup production in Marchantia polymorpha and its response to calcium deficiency andsupply of other nutrients [J]. Bot Gazette,1941,103(2):310-325.

[15] Bischler-Causse H. Marchantia L. The Asiatic and Oceanic Taxa [M]. Berlin:Lubrecht & Cramer Ltd,1989.

[16] Bao W M,Cao J G. The sporophyte and spore germination of Marchantia polymorpha[J]. Bull Biol,2000,35(1):17-19.