Endoroot bacteria derived from marigolds (Tagetes spp.) can decrease soil population densities of root-lesion nematodes in the potato root zone |
| |
Authors: | Sturz AV Kimpinski J |
| |
Institution: | 1. Prince Edward Island Department of Agriculture and Forestry, P.O. Box, 1600, Charlottetown, Prince Edward Island, Canada, C1A 7N3 2. Agriculture and Agri-Food Canada, Crops and Livestock Research Centre, 440 University Avenue, Charlottetown, Prince Edward Island, Canada, C1A 7M8
|
| |
Abstract: | Single isolates of bacterial endophytes, isolated from the nematode antagonistic plant species African (Tagetes erecta L.) and French (T. patula L.) marigold, were introduced into potatoes (Solanum tuberosum L.). Several bacterial species possessed activity against root-lesion nematodes (Pratylenchus penetrans) in soils around the root zone of potatoes, namely: Microbacterium esteraromaticum, Tsukamurella paurometabolum, isolate TP6, Pseudomonas chlororaphis, Kocuria varians and K. kristinae. Of these, M. esteraromaticum and K. varians depressed the population densities of root-lesion nematodes without incurring any yield penalty (tuber wet weight). No significant differences were found in the total numbers of P. penetrans nematodes, rhabditid nematodes or `other' parasitic nematode species within the root tissues of bacterized potato plants compared to the unbacterized check. Overall, tuber fresh weights and tuber number were equal to or significantly lower (P\le0.05) in bacterized plants than their unbacterized counterpart. We conclude that endoroot bacteria from Tagetes spp. can play a role in nematode suppression through the attenuation of nematode proliferation. We propose that these nematode control properties are capable of transfer to other crops in a rotation as a beneficial `residual' microflora – a form of beneficial microbial allelopathy. |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|