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Title: Adaptive Reprogramming During Early Seed Germination Requires Temporarily Enhanced Fermentation-A Critical Role for Alternative Oxidase Regulation That Concerns Also Microbiota Effectiveness
Authors: Bharadwaj, Revuru
Noceda, Carlos
Mohanapriya, Gunasekharan
Kumar, Sarma Rajeev
Thiers, Karine Leitão Lima
Costa, José Hélio
Macedo, Elisete Santos
Kumari, Aprajita
Gupta, Kapuganti Jagadis
Srivastava, Shivani
Adholeya, Alok
Oliveira, Manuela
Velada, Isabel
Sircar, Debabrata
Sathishkumar, Ramalingam
Arnholdt-Schmitt, Birgit
Editors: Colla, Giuseppe
Keywords: seed quality
Warburg effect
bacterial endophytes and mycorrhizal fungi
organic seeds
biotic stress
on-farm seed selection
Issue Date: 1-Oct-2021
Publisher: Frontiers Media
Citation: Bharadwaj R, Noceda C, Mohanapriya G, Kumar SR, Thiers KLL, Costa JH, Macedo ES, Kumari A, Gupta KJ, Srivastava S, Adholeya A, Oliveira M, Velada I, Sircar D, Sathishkumar R and Arnholdt-Schmitt B (2021) Adaptive Reprogramming During Early Seed Germination Requires Temporarily Enhanced Fermentation-A Critical Role for Alternative Oxidase Regulation That Concerns Also Microbiota Effectiveness. Front. Plant Sci. 12:686274. doi: 10.3389/fpls.2021.686274
Abstract: Plants respond to environmental cues via adaptive cell reprogramming that can affect whole plant and ecosystem functionality. Microbiota constitutes part of the inner and outer environment of the plant. This Umwelt underlies steady dynamics, due to complex local and global biotic and abiotic changes. Hence, adaptive plant holobiont responses are crucial for continuous metabolic adjustment at the systems level. Plants require oxygen-dependent respiration for energy-dependent adaptive morphology, such as germination, root and shoot growth, and formation of adventitious, clonal, and reproductive organs, fruits, and seeds. Fermentative paths can help in acclimation and, to our view, the role of alternative oxidase (AOX) in coordinating complex metabolic and physiological adjustments is underestimated. Cellular levels of sucrose are an important sensor of environmental stress. We explored the role of exogenous sucrose and its interplay with AOX during early seed germination. We found that sucrose-dependent initiation of fermentation during the first 12 h after imbibition (HAI) was beneficial to germination. However, parallel upregulated AOX expression was essential to control negative effects by prolonged sucrose treatment. Early downregulated AOX activity until 12 HAI improved germination efficiency in the absence of sucrose but suppressed early germination in its presence. The results also suggest that seeds inoculated with arbuscular mycorrhizal fungi (AMF) can buffer sucrose stress during germination to restore normal respiration more efficiently. Following this approach, we propose a simple method to identify organic seeds and low-cost on-farm perspectives for early identifying disease tolerance, predicting plant holobiont behavior, and improving germination. Furthermore, the research strengthens the view that AOX can serve as a powerful functional marker source for seed hologenomes.
Type: article
Appears in Collections:CIMA - Publicações - Artigos em Revistas Internacionais Com Arbitragem Científica

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