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REGULATION OF CAM THROUGH

METABOLITES

PRESENTATION BY AMREEN ANSARI

MSc-PART 1

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INTRODUCTION

CAM stands for --------------Discovered by Heyne (1804) and later by

Aubert (1815).Term coined by Ranson and Thomas (1940)Mechanism for concentrating CO2 CAM is not restricted to the family

CrassulaceaeEnables plants to improve H2O EfficiencyCAM plants have advantage in dry

environment

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CAM can be defined according to the following criteria

Succulents plantsDiurnal fluctuation of organic acidHigh activities of PEP carboxylaseStomata openingTropical origin and xeric

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CAM PLANTS

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CAM

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ATP ADP

Inhibited by insensitive to

Pi H2O

SER-DHPEP CARBOXYLASE

DAY FORM

SER- OPPEP CARBOXYLASE

NIGHT FORM

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C4 vs CAM Summary

C4 plants separate 2 steps of C fixation anatomically in 2 different cells

CAM plants separate 2 steps of C fixation temporally at2 different times

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• PHOTOSYNTHETIC SYSTEMS BY SUSAN M. DANKS,E.HILARY EVANSPETER A. WHITTAKER• CAM BY IRWIN. P. TINGMARTIN GIBBS• PLANT PHYSIOLOGY BYTEIZ AND ZEIGER• CELL BIOLOGY BY GOVINDJEE

References:

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