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A Study on Vegetative Growth Law and Leaf Anatomy of Pugionium cornutum(L.) Gaertn

HAO Li-zhen,ZHAI Sheng,JIA Jin,WANG Liu-ying,HU Ning-bao,ZHAO Qing-yan(Inner Mongolia Agricultural University, Hohhot010018,China)  
Pugionium cornutum(L.) Gaertn is a biennial herb found in the desert zone. The special species of China grows in fluxion and semi-fluxion sand dune and is a good plant for fix sand. The study on vegetative growth law and leaf anatomy of different vegetative growth stages mastered growth character of Pugionium cornutum(L.) Gaertn and relation between leaf structure and its function to provide theory foundation for cultivation and development. The results are showed below: The total vegetative growth period of Pugionium cornutum(L.) Gaertn is (130±4)d which is successively divided into four stages: germinating stage, seedling stage, vigorous growing stage and senescent growing stage, and the days of each stage are respectively 16-18 d, 20-22 d, 50-52 d,40-42 d;Leaf of Pugionium cornutum(L.) Gaertn has evolved the high photosynthesical efficiency wreath grid type leaf, transporting tissue is flourishing, but mechanical tissue is unflourishing; leaf epidermis is formed of two lager of cell which is epidemis cell and accessory epidemis cell, the number of epidemis cell developed big bulliform cell for storaging water; stoma of leaf grow below epidemis and have the bigger substomatic chamber.
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