2007•Weiti gushengwu xuebaoRequires access
MORPHOLOGY OF STOMATA OF PINACEAE AND CUPRESSACEAE FROM NORTHWESTERN CHINA
He-Wen Wan, Ji Shen, Tang Ling-yu, Li Chunhai
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Abstract
The study on the morphology of stomata of conifers is the foundation of identifying fossil stomata that is important for the study of the change of vegetation and climate.In this paper,stomata of 3 genera(8 species)of Pinaceae and 3 genera(4 species)of Cupressaceae are studied by measuring reference stomata from fresh needles which prepared using the standard pollen preparation but without HF treatment.The size of stomata is important criteria for separating Pinaceae and Cupressaceae.The stomata size,T-shape structure,the angle of attachment of the upper woody lamellae,are used together to distinguish among different genera.In genus,different species can be separated by observations such as the shape of the upper lamellae,the angle of the T-shape structure tail,stem width and length,medial lamellae border width and the outer brim of the upper woody lamellae of the stomata.A key to identify stomata is proposed.