
	American Journal of Plant Physiology
	Year: 2011 \| Volume: 6 \| Issue: 2 \| Page No.: 72-82 DOI: 10.3923/ajpp.2011.72.82

Effect of Chilling Stress on the Chlorophyll Fluorescence, Peroxidase Activity and Other Physiological Activities in Ipomoea batatas L. Genotypes

Shahidul Islam, Ehiorobo Izekor and J.O. Garner

Abstract: The growth and adaptation of tropical and subtropical herbaceous plants including sweet potatoes (Ipomoea batatas L.) are restricted by deleterious effects of low temperature stress or chilling injury. Chilling injury is the morphological and physiological damage sustained by plant tissue exposed to freezing temperatures. The aim of this investigation study was to evaluate the physiological functions of sweet potato genotypes to possibly explain tolerance to chilling injury. An experiment was conducted using four chilling tolerant sweet potato genotypes such as 105MS1, 108MS2, 180MS3, 183MS4 which were selected from seventy nine lines from three major variety crosses for tolerant to chilling injury. The effects of chilling exposure on chlorophyll fluorescence, peroxidase enzyme activity and other physiological parameters, such as specific leaf dry and fresh weight, percent leaf dry weight, percent leaf water content and stomata density were investigated. Following chilling treatment, qualitative visual ratings of the tolerant genotypes were different but the lowest score of the four on the scale of five was considered chilling tolerant. Chilling exposure decreased transpiration rate and stomata conductance but increased Electrolytic Leakage (EL) and Peroxidase Enzyme Activity (PEA). Genotypes differences were found in EL, PEA, chlorophyll fluorescence yield and other physiological functions following chilling exposure. Difference were also found among the genotypes in percent leaf dry weight and percent leaf water content which indicated the degree of water loss among the genotypes. The result suggest that breeding and selecting for chilling tolerance could enhance chilling tolerance in sweet potatoes.

PDF Fulltext XML References Citation Report Citation

RELATED ARTICLES:

•	Visual Navigation Control System for Home Robots

•	Comparative Study on Biochemical Parameters and Antioxidant Enzymes in a Drought Tolerant and a Sensitive Variety of Horsegram (Macrotyloma uniflorum) under Drought Stress

•	Effects of Low Temperature in Reactivated Cambial Cells Induced by Localized Heating During Winter Dormancy in Conifers

•	Oxidative Response of Groundnut (Arachis hypogaea) Plants to Salicylic Acid, Neem Oil Formulation and Acalypha fruticosa Leaf Extract

•	Amelioration of Chilling Injuries in Mung Bean (Vigna radiata L.) Seedlings by Paclobutrazol, Abscisic Acid and Hydrogen Peroxide

•	Carbohydrate Compositions and Peroxidase Activity in Ungerminated, Cotyledon and Embryo Tissues of Vigna unguiculata L. Walp Seed Grown Under Stress Temperatures

•	Chilling Effect on Germination and Seedling Vigour of Some Cultivated Species of Gossypium

•	Effect of Postharvest Calcium and Hot-water Dip Treatments on Catalase, Peroxidase and Superoxide Dismutase in Chilled Lisbon Lemon Fruit

How to cite this article:

Shahidul Islam, Ehiorobo Izekor and J.O. Garner, 2011. Effect of Chilling Stress on the Chlorophyll Fluorescence, Peroxidase Activity and Other Physiological Activities in Ipomoea batatas L. Genotypes. American Journal of Plant Physiology, 6: 72-82.

DOI: 10.3923/ajpp.2011.72.82

URL: https://scialert.net/abstract/?doi=ajpp.2011.72.82

COMMENT ON THIS PAPER

Navigation


		Online First
		Current Issue
		Previous Issues
		Editorial Board
		Submit a Manuscript
		Guide to Authors
		Subscribe to E-alerts

Indexed In


		ASCI-Database
		Asian Digital Library
		Cambridge Scientific Abstract
		Chemical Abstract Services
		Google Scholar

Science Alert