Humic acids induce a eustress state via photosynthesis and nitrogen metabolism leading to a root growth improvement in rice plants

Copyright © 2021 Elsevier Masson SAS. All rights reserved.

Bibliographische Detailangaben
Veröffentlicht in:Plant physiology and biochemistry : PPB. - 1991. - 162(2021) vom: 01. Mai, Seite 171-184
1. Verfasser: van Tol de Castro, Tadeu Augusto (VerfasserIn)
Weitere Verfasser: Berbara, Ricardo Luiz Louro, Tavares, Orlando Carlos Huertas, Mello, Débora Fernandes da Graça, Pereira, Erinaldo Gomes, Souza, Camila da Costa Barros de, Espinosa, Luis Maqueira, García, Andrés Calderín
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2021
Zugriff auf das übergeordnete Werk:Plant physiology and biochemistry : PPB
Schlagworte:Journal Article Bioactivity Humic substances Mode of action Structural characterization Humic Substances Soil Nitrogen N762921K75
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520 |a Chemical eustressors induce a eustress state "positive stress" increasing the resistance and improve the plant growth. The potentiality of humic acids (HA) to act as a eustressor has been scarcely explored. The present study aims to evaluate how HA with different structural characteristics induce differently, a eustress state in rice plants through the regulation of photosynthesis. The photosynthetic performance index showed an initial eustress state in plant by HA application characterized by reduction in photosynthesis followed by an increase in photosynthetic efficiency. The HA as a chemical eustressor triggering changes in plant metabolism indicate that the interaction of HA with root system induces a roots growth stimulus preceded by an initial positive stress. The eustress caused by HA is differentiated and is related to its chemical-physics characteristics. The HAVC, with a predominance of CAlkyl-(O,N), CAlkyl-di-O, CAromatic-O structures and greater polarity, stimulated the accumulation of N-NO3- and of soluble sugars in the sheath, increase carbohydrates content in the root and the root emission, resulting in higher total biomass production. The HASOIL, with a predominance of CCOOH-(H,R), CAlkyl-O, CAromatic-H,R structures and greater hydrophobicity caused a decrease in N-NH4+ and N-amine. The HARN, with a predominance of CAlkyl-O, CAlkyl-H,R, and CO, characterized by average polarity, caused an increase in photosynthetic pigment and N-NH4+ content. These results are keys to understand that quality of soil organic matter is related to plant development and that HA are efficient proxies for elucidate its function in natural environments 
650 4 |a Journal Article 
650 4 |a Bioactivity 
650 4 |a Humic substances 
650 4 |a Mode of action 
650 4 |a Structural characterization 
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650 7 |a Soil  |2 NLM 
650 7 |a Nitrogen  |2 NLM 
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700 1 |a Berbara, Ricardo Luiz Louro  |e verfasserin  |4 aut 
700 1 |a Tavares, Orlando Carlos Huertas  |e verfasserin  |4 aut 
700 1 |a Mello, Débora Fernandes da Graça  |e verfasserin  |4 aut 
700 1 |a Pereira, Erinaldo Gomes  |e verfasserin  |4 aut 
700 1 |a Souza, Camila da Costa Barros de  |e verfasserin  |4 aut 
700 1 |a Espinosa, Luis Maqueira  |e verfasserin  |4 aut 
700 1 |a García, Andrés Calderín  |e verfasserin  |4 aut 
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773 1 8 |g volume:162  |g year:2021  |g day:01  |g month:05  |g pages:171-184 
856 4 0 |u http://dx.doi.org/10.1016/j.plaphy.2021.02.043  |3 Volltext 
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