The Journal of Plant Physiology & Pathology (JPPP) promotes rigorous research that makes a significant contribution in advancing knowledge for Plant Physiology & Pathology. JPPP includes all major themes pertaining to plant diseases.
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Arsenic Phytotoxicity in Black Gram (Vigna mungo L.Var. PU19) and its Possible Amelioration by Phosphate Application
To study the toxic effect of arsenic on black gram (Vigna mungo var. PU19) a pot experiment was conducted. Arsenic reduced the germination percentage and root and shoot length of black gram. Higher dose of arsenic (100 μM sodium arsenate) significantly reduced the level of photosynthetic pigments. Increased oxidative stress was observed as evident from enhanced level of lipid peroxidation and electrolyte leakage percentage. However, decreased catalase activity indicated its failure as antioxidant enzyme against arsenic exposure. Treatment of phosphate together with arsenic induced growth and metabolism in black gram as compared to arsenic treatment alone.
Effect of Castor Bean Oil on Post Harvest Fungal Pathogen of Coconut: Lasiodiplodia theobromae
Lasiodiplodia theobromae is a cosmopolitan soil-borne fungus that causes both field and storage diseases in plant species leading to economic losses. The fungicides used to control these diseases are harmful as they leave residues, which may be regarded as problem for the marketing and export of Brazilian fruits. This study evaluated the in vitro effect of castor bean oil (Ricinus communis), and its constituents, on the mycelial growth and spore germination of this pathogen, suggesting an alternative to chemical control during the post-harvest.
Evaluation of the Resistance and Differential Induction of Chitinases in Tomato in Response to Inoculation with Fusarium oxysporum f. sp.lycopersici
Fusarium oxysporum f. sp. lycopersici (FOL) causes Fusarium wilt in tomato, a disease that significantly affects its production. This project investigated the response of different tomato genotypes to Fusarium wilt, aiming at selecting sources of resistance, as well as identifying the differential chitinase secretion during infection between resistant and susceptible cultivars. Results show that the BHRS cultivar proved to be resistant to the disease and there was increased chitinolytic activity in the roots of this genotype six days after inoculation (dai).
Initial Population Density its Effect on the Pathogenic Potential and Population Growth of Rotylenchulus reniformis on Cowpea (Vigna unguiculata L.)
A glasshouse experiment was conducted to assess the potential of Rotylenchulus reniformis population of Delhi on cowpea (Vigna unguiculata) cultivar Pusa komal. In the present study, different inoculums levels viz., 10, 100, 1000 and 10000 with immature females and equal number of males were inoculated in the rhizosphere of ten day old cowpea plants. Significant reduction in growth parameters were recorded at 1,000 and 10,000 females/ plants.