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Occurrence of Crassulacean Acid Metabolism in Leaves of Aristolochia Bracteata Ritz

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Abstract

Aristolochia bracteata Ritz, is a common weed of fallowlands of hot, semi-arid region of Baramati area. High succulence index was noticed in leaf tissues along with marked diurnal fluctuations in titratable acidity status, and pH of leaf sap. Stomatal behaviour also followed typical CAM pattern. All these findings conclude that Crassulacean Acid Metabolism is in operation in this species.
... These findings clearly indicated that CAM is also a mode of photosynthesis in this species. In previous studies CAM behaviour was reported in Thlaspi arvense of Brassicaceae and Aristolochia bracteata of Aristolochiaceae (Deshmukh and Murumkar, 1996). Thus in present findings, the occurrence of CAM in C. nudiflora clearly designated a strong positive function between acidity and CAM mode of photosynthesis in plants growing under extreme drought conditions. ...
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