Effects of methyl jasmonate and phosphorus on PAL activitity, flavonoids and some physiological parameters in leaves and fruit of red pepper

Subject Areas : Journal of Plant Ecophysiology

کلثوم شمس الدینی ¹ , بتول کرامت ^{2 *} , حسین مظفری ³

1 - کارشناس ارشد
2 - دانشگاه باهنر کرمان
3 - عضو هیات علمی

Received: 2015-04-21 Accepted : 2015-12-01 Published : 2016-12-01

Keywords: Dry weight, Capsicum annuum, defence compounds, Chlorophyll content,

Abstract :

JasAbstract Jasmonates are naturally occurring plant growth regulators, which can affect many physiological and biochemical processes in higher plants. Phosphorus is an essential nutrient for plant growth and development. It plays a fundamental role in metabolism and energy production in plants. In this study, the effects of methyl jasmonate (0, 50 and 100 μM) and phosphoru (0, 2 and 4 mM) on dry weight, chlorophyll content, flavonoids content and phenylalanine ammonia- lyase (PAL) activity in leaves and fruits of red pepper plants in the reproductive stage were examined. The results showed that methyl jasmonate and phosphorus (in both concentrations) significantly increased the dry weight of treated plants compared to control. Moreover, using of both methyl jasmonate(50 µM) and phosphorus (2, 4 mM) led to increase in chlorophyll a, b and total chlorophyll content compared with control plants. Application of 50 μM MJ with 2 and 4 mM phosphorus enhanced flavonoid content in leaves while in fruit, MJ 100 Μm with 4 Mm of phosphorus effective treatments. PAL activity analysis revealed that methyl jasmonate(100 µM) in combination with phosphorus (4 mM) increased the activity of this enzyme in fruit pepper.