Plant growth promoting rhizhobacteria (PGPR)-mediated root proliferation in black pepper (Piper nigrum L.) as evidenced through GS Root software

Paul, Diby and Sarma, Y.R. (2006) Plant growth promoting rhizhobacteria (PGPR)-mediated root proliferation in black pepper (Piper nigrum L.) as evidenced through GS Root software. Archives of Phytopathology and Plant Protection, 39 (0). pp. 1-4.

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Abstract

Pseudomonas fluorescens strains which are proven biocontrol agents in black pepper against foot rot (caused by Phytophthora capsici ) were also found to enhance root proliferation and fibre root production. Experiments conducted in the greenhouse with five efficient strains of P. fluorescens (IISR-6, IISR-8, IISR-11, IISR-13 and IISR-51) showed that the bacterial strains could significantly increase the root biomass of the plants (30 – 135%). Parameters for total root length, root area and root tips were estimated by scanning the entire root system and analysis through GS Root1 software (PP systems, Winterstreet, USA). All the strains increased the root length in the treated plants (12 – 127%), the highest being with IISR-6, which was on a par with IISR-11 and IISR-51. A similar trend was observed with the total root area after bacterization (43 – 200%). The P. fluorescens treated plants had a higher number of feeder roots as evidenced by the increased number of root tips (82 – 137%). The enhanced growth parameters upon root bacterization could be corroborated with the production of the plant growth hormones IAA & GA by the bacterial strains and their P-solubilization potential.

EPrint Type:Article
Uncontrolled Keywords:Pseudomonas fluorescens, Black pepper, Root Proliferation, Plant growth hormones, Foot rot
Subjects:Plants > Plant Components
Food and Beverages > Food > Condiments > Spices > Black Pepper
Biological Sciences > Biology
Growth Substances, Pigments, and Vitamins > Growth Substances > Plant Growth Regulators
Bacteria > Gram-Negative Bacteria > Gram-Negative Aerobic Bacteria > Gram-Negative Aerobic Rods and Cocci > Pseudomonadaceae > Pseudomonas
Plants > Plant Families and Groups > Angiosperms > Piperaceae
Animal Diseases > Foot Rot
Immunologic and Biological Factors > Biological Factors > Growth Substances
Plants > Plants, Medicinal
ID Code:2082
Deposited By:Dr Diby Paul
Deposited On:18 April 2007

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