Indigenous bacteria, an excellent reservoir of functional plant growth promoters for enhancing duckweed biomass yield on site

Khairina, Yeni; Jog, Rahul; Boonmak, Chanita; Toyama, Tadashi; Oyama, Tokitaka; Morikawa, Masaaki

doi:10.1016/j.chemosphere.2020.129247

Cited by 34 publications

(23 citation statements)

References 24 publications

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“…Of high interest concerning a standardized non-axenic cultivation process is the growth of algae and microorganisms and how they influence duckweed growth and culture medium composition. The use of plant growth-promoting bacteria in particular may open up new opportunities [ 36 ]. Alongside the quality, the amount of biomass and protein yielded is of great importance.…”

Section: Discussionmentioning

confidence: 99%

Influence of the Nitrate-N to Ammonium-N Ratio on Relative Growth Rate and Crude Protein Content in the Duckweeds Lemna minor and Wolffiella hyalina

Petersen

Demann

Restemeyer

et al. 2021

Plants

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In order to produce protein-rich duckweed for human and animal consumption, a stable cultivation process, including an optimal nutrient supply for each species, must be implemented. Modified nutrient media, based on the N-medium for duckweed cultivation, were tested on the relative growth rate (RGR) and crude protein content (CPC) of Lemna minor and Wolffiella hyalina, as well as the decrease of nitrate-N and ammonium-N in the media. Five different nitrate-N to ammonium-N molar ratios were diluted to 10% and 50% of the original N-medium concentration. The media mainly consisted of agricultural fertilizers. A ratio of 75% nitrate-N and 25% ammonium-N, with a dilution of 50%, yielded the best results for both species. Based on the dry weight (DW), L. minor achieved a RGR of 0.23 ± 0.009 d−1 and a CPC of 37.8 ± 0.42%, while W. hyalina’s maximum RGR was 0.22 ± 0.017 d−1, with a CPC of 43.9 ± 0.34%. The relative protein yield per week and m2 was highest at this ratio and dilution, as well as the ammonium-N decrease in the corresponding medium. These results could be implemented in duckweed research and applications if a high protein content or protein yield is the aim.

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Section: Discussionmentioning

confidence: 99%

Influence of the Nitrate-N to Ammonium-N Ratio on Relative Growth Rate and Crude Protein Content in the Duckweeds Lemna minor and Wolffiella hyalina

Petersen

Demann

Restemeyer

et al. 2021

Plants

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“…Whereas plant-microbe interaction can thus clearly benefit the plant, the existence of additional layers of complexity should be noted. Microorganisms may engage in competition with plants for mineral nutrients in certain environments; the same bacterial strains that strongly promoted duckweed growth under some conditions reduced plant growth under limiting levels of mineral nutrients other than nitrogen [127,130,133]. Duckweeds are an attractive model system for the study of plant-microbe interaction due to the ease of inoculation and manipulation of the rhizosphere as well as the fact that their small size and high growth rates favor multi-factorial design of growth experiments in different growth environments with plants fully acclimated to these conditions.…”

Section: Plant-microbe Interaction and The Abiotic Environmentmentioning

confidence: 99%

Growth and Nutritional Quality of Lemnaceae Viewed Comparatively in an Ecological and Evolutionary Context

López‐Pozo

Polutchko

Fourounjian

et al. 2022

Plants

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This review focuses on recently characterized traits of the aquatic floating plant Lemna with an emphasis on its capacity to combine rapid growth with the accumulation of high levels of the essential human micronutrient zeaxanthin due to an unusual pigment composition not seen in other fast-growing plants. In addition, Lemna’s response to elevated CO2 was evaluated in the context of the source–sink balance between plant sugar production and consumption. These and other traits of Lemnaceae are compared with those of other floating aquatic plants as well as terrestrial plants adapted to different environments. It was concluded that the unique features of aquatic plants reflect adaptations to the freshwater environment, including rapid growth, high productivity, and exceptionally strong accumulation of high-quality vegetative storage protein and human antioxidant micronutrients. It was further concluded that the insensitivity of growth rate to environmental conditions and plant source–sink imbalance may allow duckweeds to take advantage of elevated atmospheric CO2 levels via particularly strong stimulation of biomass production and only minor declines in the growth of new tissue. It is proposed that declines in nutritional quality under elevated CO2 (due to regulatory adjustments in photosynthetic metabolism) may be mitigated by plant–microbe interaction, for which duckweeds have a high propensity.

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“…However, more work is needed to understand plant interaction with microbial communities in specific environmental contexts. For example, inoculation of a sterile aquatic plant line (genus Lemna) with a bacterial strain widely reported to promote plant growth resulted in pronounced growth enhancement under some conditions but in growth penalties under other conditions -where the bacterium competed with the plant for mineral nutrients (Ishizawa et al 2017, Khairina et al 2021. Ishizawa et al (2020) also reported both beneficial and adverse effects of microorganisms on duckweed growth, and future research is warranted to further elucidate the mechanisms of these interactions (for a review on the potential of duckweeds as a model system for research on plant-microbe interaction and other aspects of plant biology, see Acosta et al 2021).…”

Section: Plant Microbiome and Plant Productivitymentioning

confidence: 99%

Intersections: photosynthesis, abiotic stress, and the plant microbiome

Adams¹,

Polutchko²,

Zenir³

et al. 2022

Photosynt.

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Indigenous bacteria, an excellent reservoir of functional plant growth promoters for enhancing duckweed biomass yield on site

Cited by 34 publications

References 24 publications

Influence of the Nitrate-N to Ammonium-N Ratio on Relative Growth Rate and Crude Protein Content in the Duckweeds Lemna minor and Wolffiella hyalina

Influence of the Nitrate-N to Ammonium-N Ratio on Relative Growth Rate and Crude Protein Content in the Duckweeds Lemna minor and Wolffiella hyalina

Growth and Nutritional Quality of Lemnaceae Viewed Comparatively in an Ecological and Evolutionary Context

Intersections: photosynthesis, abiotic stress, and the plant microbiome

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