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Plant Systematics and Evolution

, Volume 305, Issue 3, pp 223–232 | Cite as

Morphological structure and physiological research of heterophylly in Potamogeton octandrus

  • Xiaoxia Li
  • Dingxuan HeEmail author
  • Youhao Guo
Original Article
  • 168 Downloads

Abstract

Heterophylly is regarded as a manifestation of aquatic plants adapting to environment in evolutionary process. We studied the morphological and anatomical structure of submerged and floating leaves of Potamogeton octandrus. The changes of four endogenous hormones levels during the development of heterophylly were measured. The results showed that the epidermis thickness of floating leaves increased significantly compared with submerged leaves. The stomata only distribute on floating leaves, and the upper epidermis had obvious wax. While the submerged leaf epidermis was smooth and had no waxy ornamentation, chlorophyll content of floating leaves was significantly higher than that of submerged leaves. The four endogenous hormones showed a different change pattern in the development process of submerged and floating leaves. ABA content showed a trend of increased first and then decreased in the development of submerged leaves, while it gradually increased in floating leaves. GA3 content decreased significantly in the development of floating leaves, but showed an upward trend in submerged leaves. ZT content generally increased during the development of submerged and the floating leaves, while IAA content was the highest in the shoot and then declined rapidly. The difference characteristics in submerged and floating leaves can be considered as adaptation mechanism in plants development, and the four endogenous hormones may play different roles in development stages of heterophylly.

Keywords

Anatomical structure Chlorophyll Endogenous hormone Heterophylly Potamogeton octandrus Stomata 

Notes

Acknowledgements

This work was financially supported from the Fundamental Research Funds for the Central Non-profit Research Institution of CAF (CAFINT2014C14, CAFYBB2014QB04) and National Natural Science Foundation of China (31400166).

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Copyright information

© Springer-Verlag GmbH Austria, part of Springer Nature 2019

Authors and Affiliations

  1. 1.Beijing Key Laboratory of Wetland Services and Restoration, Institute of Wetland ResearchChinese Academy of ForestryBeijingPeople’s Republic of China
  2. 2.Laboratory of Plant Systematics and Evolutionary Biology, College of Life ScienceWuhan UniversityWuhanPeople’s Republic of China
  3. 3.School of Biological and Pharmaceutical EngineeringXinyang Agriculture and Forestry UniversityXinyangPeople’s Republic of China

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