From Seed to Salad: Impacts of Acc Deaminase-Containing Plant Growth Promoting Rhizobacteria on Lettuce Growth and Development

Teijeiro, Rosalia Garcia; Dodd, Ian C.; Elphinstone, E. D.; Сафронова, В.И.; Belimov, Andrey A.

doi:10.17660/actahortic.2011.898.30

Cited by 2 publications

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“…Here, we report a striking finding that rhizosphere bacteria containing ACC deaminase ( Variovorax paradoxus 5C‐2) had significant impacts on maize root growth with nutrient (ammonium (NH 4 + ) and phosphorus (P)) localized supply, and this effect was highly related to the decreased root ethylene content. Our results supported the similar findings that the rhizobacterium V. paradoxus 5C‐2 can stimulate root elongation in vitro in a range of species such as tomato (Belimov et al, 2007) and lettuce (Teijeiro et al, 2011). In the present study, rhizobacterium V. paradoxus 5C‐2 also significantly increased root length density following localized fertilizer (NH 4 + and P) application in the field conditions (Figure 3).…”

Section: Discussionsupporting

confidence: 91%

Rhizosphere bacteria containing ACC deaminase decrease root ethylene emission and improve maize root growth with localized nutrient supply

Jin

et al. 2021

Food and Energy Security

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Localized nutrient supply can enhance maize root proliferation, but also increase root ethylene production. Whether engineering ethylene signalling in the rhizosphere can further enhance root growth and nutrient uptake remains unknown. Here, field and column experiments for maize (Zea mays. L) were designed as different nutrient treatments (broadcast or localized nutrient supply containing ammonium and phosphorus) with or without inoculation with rhizobacterium Variovorax paradoxus 5C‐2 containing the 1‐aminocyclopropane‐1‐carboxylate (ACC) deaminase. Rhizobacterial inoculation increased shoot biomass by 12% and root length density by 50% with localized nutrient supply. Meanwhile, localized nutrient supply increased root ethylene production by 54% compared with broadcast, and rhizobacterial inoculation prevented the increase in root ethylene. Reduced root ethylene production following V. paradoxus 5C‐2 inoculation was highly associated with a greater proportion of fine root proliferation under localized nutrient supply, which may account for the increased nitrogen and phosphorus uptake. Our work sheds light on the understanding of the interactions between root and microbe through taking hormone into consideration to dissect the relationship between below ground and above ground. It is useful to explore the strategy of soil–crop management by introducing rhizosphere microorganisms to regulate plant ethylene signal and then benefit sustainable agriculture.

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Section: Discussionsupporting

confidence: 91%

Rhizosphere bacteria containing ACC deaminase decrease root ethylene emission and improve maize root growth with localized nutrient supply

Jin

et al. 2021

Food and Energy Security

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“…Meanwhile, plants in groups 2, 4 and 6 were additionally supplied with 4 mL of a suspension of V. paradoxus 5C-2 (10 8 cells mL -1 ) every 4 days, and irrigated on intervening days with nutrient solutions at the required salt concentrations. In comparison, field experiments with this organism have applied single doses of 10 10 cells mL -1 at transplanting (Teijeiro et al 2011).…”

Section: Plant Culture and Growth Conditionsmentioning

confidence: 99%

Rhizosphere bacteria containing 1-aminocyclopropane-1- carboxylate deaminase increase growth and photosynthesis of pea plants under salt stress by limiting Na+ accumulation

Wang

Dodd

Belimov

et al. 2016

Functional Plant Biol.

158

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Abstract. Although plant salt tolerance has been improved by soil inoculation with rhizobacteria containing the enzyme 1-aminocyclopropane-1-carboxylate (ACC) deaminase (which metabolises ACC, the immediate precursor of the phytohormone ethylene), it is not always clear whether ion homeostasis and plant water relations are affected. When pea (Pisum sativum L. cv. Alderman) was grown with 70 and 130 mM NaCl, the ACC-deaminase containing rhizobacterium Variovorax paradoxus 5C-2 increased total biomass by 25 and 54% respectively. Nutrient flow modelling showed that V. paradoxus 5C-2 increased K uptake and root to shoot K flow, but decreased Na flow and increased Na deposition in roots. Thus, shoot K + : Na + ratio increased following V. paradoxus 5C-2 inoculation. At 70 and 130 mM NaCl, rhizobacterial inoculation decreased stomatal resistance by 14 and 31% and decreased xylem balancing pressure by 7 and 21% respectively. Furthermore, rhizobacterial inoculation improved photosynthetic efficiency (F v /F m ) by 12 and 19% and increased maximal electron transport rate (ETR) by 18 and 22% at 70 and 130 mM NaCl respectively. Thus V. paradoxus 5C-2 mitigates salt stress by improving water relations, ion homeostasis and photosynthesis of pea plants, and may provide an economic means of promoting growth of plants exposed to salt stress.Additional keywords: ion homeostasis, maximal electron transport rate, nutrient flow modelling, photosynthetic efficiency, water relations.

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From Seed to Salad: Impacts of Acc Deaminase-Containing Plant Growth Promoting Rhizobacteria on Lettuce Growth and Development

Cited by 2 publications

References 0 publications

Rhizosphere bacteria containing ACC deaminase decrease root ethylene emission and improve maize root growth with localized nutrient supply

Rhizosphere bacteria containing ACC deaminase decrease root ethylene emission and improve maize root growth with localized nutrient supply

Rhizosphere bacteria containing 1-aminocyclopropane-1- carboxylate deaminase increase growth and photosynthesis of pea plants under salt stress by limiting Na+ accumulation

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