Paper Information

Journal:   IRANIAN JOURNAL OF HORTICULTURAL SCIENCE AND TECHNOLOGY   FALL 2009 , Volume 10 , Number 3; Page(s) 223 To 234.
 
Paper: 

EFFECT OF DROUGHT STRESS ON YIELD, PROLINE CONTENTS, SOLUBLE SUGARS, CHLOROPHYLL, RELATIVE WATER CONTENTS AND ESSENTIAL OIL IN PEPPERMINT (MENTHA PIPERITA L.)

 
 
Author(s):  IZADI Z., ESNA ASHARI M., AHMADVAND G.
 
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Abstract: 

In this research, effect of drought stress on physiological characteristics of pep perm in (Mentha piperita L.), was performed in the research farm of the Faculty of Agriculture, Bu-Ali Sina University, in 2008. Experiment was conducted using randomized block design with four replications for every treatment. Treatment included T1 (non stress), T2 (80% FC), T3 (60% FC), T4 (40% FC) and T5, (20% FC). The results showed that, effect of drought stress on fresh and dry yield, chlorophyll a, chlorophyll b, proline, soluble sugars, relative water contents and essential oil percentage and yield were significant (P<0.01). Effect of drought stress on total chlorophyll was significant (P<0.05). Comparison of treatment means showed that highest fresh yield (14311 kg ha-1) and dry yield (8912.25 kg ha-1) were related to T1 (control). Highest chlorophyll a (1.987 mg 1-1) and total chlorophyll (2.321 mg 1-1) were related to T1 (control) and highest chlorophyll b (1.198 mg 1-1) was related to T5, (20% FC), respectively. Highest accumulation of proline with 2.258 mg 1-1 mean was related to T3, (20% FC). The highest amount of soluble sugar with 2.523 mg 1-1 mean was obtained when T3 (60% FC) used. Maximum relative water content with 97.123 mean percentage related to T1 (control). Also the highest amount of essential oil was obtained when T3 (60% FC) used. It could be concluded that plant accumulation of proline and soluble sugars increased tolerance and showed that moderate drought stress is beneficial for peppermint production.

 
Keyword(s): ESSENTIAL OIL, CHLOROPHYLL, DROUGHT STRESS, PEPPERMINT (MENTHA PIPERITA L.), PROLINE, SOLUBLE SUGARS, RWC, YIELD
 
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