Welcome to Bulletin of Botanical Research! Today is Share:

Bulletin of Botanical Research ›› 2017, Vol. 37 ›› Issue (1): 31-36.doi: 10.7525/j.issn.1673-5102.2017.01.005

Previous Articles     Next Articles

Morphological Diversity of Gemma Cups on Marchantia paleacea subsp. diptera and Gemma Spread at Karst Mountains Area in Winter

SHANG Guan-Min1, WANG Zhi-Hui1, ZHANG Zhao-Hui2   

  1. 1. School of Life Sciences Guizhou Normal University, Guiyang 550001;
    2. Key Laboratory for Information System of Mountainous Area and Protection of Ecological Environment of Guizhou Province, Guizhou Normal University, Guiyang 550001
  • Received:2016-09-26 Online:2017-01-15 Published:2017-03-06
  • Supported by:
    Natural Science Foundation of China(31360035)

Abstract: Gemma cup is Marchantia peculiar asexual reproductive organs, but there is little study on its morphological characteristics and spread behavior in winter. With Marchantia paleacea subsp. diptera at Guizhou karst mountain area, we observed the gemma cup and gemma output in wild, and analyzed sample in the coldest winter in January 2016. The gemma cups form were varied. The gemma cups were divided into four growth period:immature period(transparent), mature period(green), recession period(purple) and decline period(atropurpureus) according to their color and gemma characteristics. The four growth periods reflected the different stages of growth and development of gemma cup. Each growth period had a different number of gemma cup, showing apoptotic characteristics orderly. In 708 gemma cups, the numbers of four period were 62, 209, 254 and 183, respectively. The average output of gemmae in different period of gemma cup was significantly different, the average gemmae output of four-period cups were 42, 131, 87 and 0, respectively. The densities of the gemma cup and gemma on the gametophyte were higher in winter, each square meter reached 10139 and 754889. Except the common by raindrops tapping spread, the winter gemma could spread by gravity. Therefore, M.paleacea subsp. diptera gemma cup in different periods and the formation of gemma are still very rich, and with the positive survival significance for the species to adapt to severe environmental conditions at karst mountains area in the cold months.

Key words: Marchantia paleacea subsp. diptera, gemma cup, gemma output, Karst mountain, winter

CLC Number: