Tracheary Element Structure of Some Gymnosperms with Angiosperms: A Comparative Study| Chapter 1 | Research Highlights in Agricultural Sciences Vol. 7

 This division presented approximate studies of vessel types and makeup in some gymnosperms and angiosperms. The tissues of the pinna and vertebral column of Cycas diannaensis and pinna, backbone, and root of Cycas taiwaniana, rachis of Cycas szechuanensis, stem of Metasequoia glyptostroboides (Taxodiaceae), stems of Chamaecyparis obtusa (Sieb.et Zucc.) Endl cv. Tetragona (Cupressaceae), and leaves and stems of Michelia alba and Michelia figo and stems of Amygdalus persica (angiosperms) were distinguished using thumbing through electron microscopy.All of these gymnosperm species have perforations finally walls and sideways walls of their abundant tracheary elements. Certain tracheary elements are vessels cause they have these structural similarities accompanying angiosperm vessels. Cycads have a difference of vessel types, containing spiral and pitted containers in Chamaecyparis obtusa cv. Tetragona, and pitted vessels in M. glyptostroboides. Cycads, the additional two gymnosperms, and the angiosperms all have identical bowl development and fundamental traits. Some traits, such as in consideration of incline of the perforated plate in the end obstruction, demonstrated that few angiosperms had more primitive bowl characteristics than cycads or M. glyptostroboides and C. obtusa cv. Tetragona or glyptostroboides. Numerous of the angiosperms' container elements were band-shaped, had abundant walls, only two sideways walls, and two borders. The ends of some of these bowl elements are severe with no perforations, while many perforations are only found in the sideways wall.In all variety, parenchyma cell obstruction possessed only a thin basic wall and no perforations, with the exception of tracheae.

Author(s) Details:

Yuyuan Huang,
College of Life Sciences, Zhongkai University of Agriculture and Engineering, Guangzhou, China and Agricultural College, Guangxi University, Nanning, China.

Yanhua Han,
College of Life Sciences, Zhongkai University of Agriculture and Engineering, Guangzhou, China.

Lijun Wei,
Agricultural College, Guangxi University, Nanning, China.

Jiazhuo Wang,
Guangxi Subtropical Institute of Crops, Nanning, China.

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