EFFECTS OF THREE PLANT GROWTH-PROMOTING RHIZOBACTERIA ON THE GROWTH OF SEEDLINGS OF TOMATO AND PEPPER IN TWO DIFFERENT STERILIZED AND NONSTERILIZED PEATS

Authors: GARCÍA J.L.; PROBANZA A.; RAMOS B.; MAÑERO F.G.

Source: Archives of Agronomy and Soil Science, Volume 49, Number 1, February 2003 , pp. 119-127(9)

Publisher: Taylor and Francis Ltd

Abstract:

The effects of three Plant Growth-Promoting Rhizobacteria (PGPRs) on tomato and pepper seedlings grown in two types of peat (brown and black, each sterilized or unsterilized) were studied. After sterilization, the seeds were unable to germinate in the brown peat. All three bacteria had the capacity to modify the growth, but tomato seedlings responded better than pepper seedlings, possibly indicating better root colonization in the former. All bacteria increased total stem length of tomato seedlings in nonsterilized brown peat, nonsterilized black peat and sterilized black peat. Plant shoot surface was also increased in nonsterilized brown peat and in sterilized black peat. The results show that plants, especially tomato, grown in nonsterilized black peat are smaller than in nonsterilized brown peat. The results obtained in sterilized peat show that there are no differences between sterilized and nonsterilized peat. Therefore, factors other than competition with other microorganisms must be more important in the performance of the bacterial inoculants. Root growth was only modified in nonsterilized black peat with two bacteria, in pepper it increased, and in tomato, decreased. These different effects could be due to a hormonal effect of the auxins, which influence root growth.

Keywords: tomato; pepper; PGPRs; colonization; phytohormones

Document Type: Research article

DOI: http://dx.doi.org/10.1080/0365034031000079711

Affiliations: 1: Univ. San Pablo CEU, Fac. CC. Experimentales y Técnicas, Dept. CC. Ambientales y Recursos Naturales, 28668, Boadilla del Monte, Madrid, Spain

Publication date: 2003-02-01

More about this publication?

• Information for Authors
• Subscribe to this Title
• ingentaconnect is not responsible for the content or availability of external websites

Related content

• In this: publication
• By this: publisher
• In this Subject: Agriculture (General)
• By this author: GARCÍA J.L. ;  PROBANZA A. ;  RAMOS B. ;  MAÑERO F.G.

Website © Publishing Technology. Article copyright remains with the publisher, society or author(s) as specified within the article.

• Terms and conditions
• Privacy policy
• Information for advertisers