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Pune University - MSc - II (Sem - III) : Plant Physiology, April 2010

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Total No. of Questions : 8] P1044 [Total No. of Pages : 2 [3727] - 306 M.Sc. - II BOTANY BO - 3.34: Plant Physiology (Special paper - I) (New) (Sem. - III) Time : 3 Hours] [Max. Marks : 80 Instructions to the candidates: 1) Answer any five questions, taking atleast two questions from each section. 2) Answers to the two sections should be written in separate answer books. 3) 4) All questions carry equal marks. Neat labelled diagrams must be drawn wherever necessary. 1 ) What are halophytes? Explain various mechanisms of salinity tolerance in halophytes. 2 ) What is water logging? Give the causes, importance and consequences of water logging. 3 ) a) What is the difference between saline and sodic soils? Add a note on their causes. b) Comment on the role of proline, polyols and stress induced proteins in water stress condition. 4 ) Write notes on any two of the following: a) Mechanism of flood tolerance. b) Study of stress physiology in present context. c) Effects of drought on plant metabolism. , P.T.O. SECTION - II 5) Describe the effect of air pollutants like CO and SO2 on the metabolism of plant. 6 ) What is photoinhibition? Add a note on the mechanism of uv tolerance. 7) ) b) What is the scope, concept and importance of ion stress. What is ROS generation? Add a note on its effect on plants and on its scavenging. 8 ) Write notes on any two of the following: ) Scope and importance of pollution stress. b) Toxicity of Fe and Mn on plant metabolism c) Mechanism of ion toxicity tolerance. ***** [3727] - 306 -2-

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Additional Info : M.Sc. - II BOTANY, BO - 3.34 : Plant Physiology (Special paper - I) (New Course) (Semister - III), Pune University
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