The potential benefits from cultivar specific red clover ‐potato crop rotations

Abstract

The aim of this study was to determine if endophytic bacteria could contribute to cultivar specific interactions between red clover (Trifolium pratense L.) and potatoes (Solanum tuberosum L.) in crop rotations. Endophytic bacteria were isolated from the roots of four red clover cultivars (AC Charlie, Altaswede, Marino and Tempus) grown in the field. Populations of bacteria from each cultivar were similar. The most abundant genus was Rhizobium, but species of Curtobacterium, Pseudomonas, and Xanthomonas were common to all cultivars. Plantlets of two potato cultivars, Russet Burbank and Shepody, were inoculated individually with the seven bacterial isolates most frequently recovered from each red clover cultivar, and grown in Magenta vessels for 6 wk. Significant differences were found for plant height, and wet weights of roots, shoots and their total. Potato cultivars differed for root wet weight only, while red clover cultivar, as a source of bacteria, had a significant effect on all traits except plant height. Differences among bacteria were significant for all traits except shoot wet weight. There was a significant interaction of potato cultivar by red clover cultivar. The potato cultivar Russet Burbank did best with bacteria from the red clover cultivar, Marino; and Shepody, with bacteria from Altaswede.

Endophytic Fungal Flora from Roots and Fruits of an Indian Neem Plant Azadirachta indica A. Juss., and Impact of Culture Media on their Isolation

“…Some earlier workers also investigated the effects of isolation media on species richness in twigs and leaves of Chamaecyparis thyoides. It was found that 1% malt extract and 2% yeast extract with 50 ppm each of Streptomycin and chlortetracycline gave the highest species richness for endophytic isolation [28]. One source of variation in the number of species could be the composition of the medium, as well as suitability of their constituents for fungal growth.…”

Populations and functional diversity of bacteria associated with barley, wheat and canola roots

“…Crop sequences can favour the build-up of beneficial endophytic bacterial populations (Peters et al 2003). For example, certain cultivars of red clover have been found to foster the development of rhizospheric and endophytic bacteria that promote the growth of subsequent potato crops (Sturz and Christie 1998). Lupwayi et al (2004) reported the distribution of R. leguminosarum bv.…”

Characterization of culturable bacterial endophytes of switchgrass (Panicum virgatum L.) and their capacity to influence plant growth

“…As mutualists, endophytes have been shown to elicit functional consequences on their plant host (Schardl et al ., ), in terms of improved water and nutrient uptake (Pillay & Nowak, ), nitrogen fixation (Krause, ), assisting with herbivore resistance by producing toxic secondary metabolites (Siciliano, ), improving the capacity to resist disease (Choudhary & Johri, ) and by promoting plant growth and overall primary productivity (Compant et al ., ). In addition, plant‐endophyte associations have been found to confer partial tolerance to environmental toxins such as heavy metals and chemicals (Barac, ; Ma, ; Sturz & Christie, ). Bacterial endophytes have been isolated and identified from tubers (Sessitsch et al ., ), stems, fruit, and seeds (Olivares et al ., ).…”