Mycorrhizas and Trichoderma fungi increase the accumulation of secondary metabolites in grain legume leaves and suppress foliar diseases in field-grown conditions of the humid forest of Cameroon.

Autor: Jemo M; AgroBiosciences Program, College of Agriculture and Environmental Sciences (CAES), Mohammed VI Polytechnic University (UM6P), Lot 660, Hay Moulay Rachid, Benguerir, 43150, Morocco. martin.jemo@um6p.ma., Nkenmegne S; Department of Plant Biology, Faculty of Science, University of Yaoundé I, P.O. Box. 812, Yaoundé, Cameroon., Buernor AB; AgroBiosciences Program, College of Agriculture and Environmental Sciences (CAES), Mohammed VI Polytechnic University (UM6P), Lot 660, Hay Moulay Rachid, Benguerir, 43150, Morocco., Raklami A; AgroBiosciences Program, College of Agriculture and Environmental Sciences (CAES), Mohammed VI Polytechnic University (UM6P), Lot 660, Hay Moulay Rachid, Benguerir, 43150, Morocco., Ambang Z; Department of Plant Biology, Faculty of Science, University of Yaoundé I, P.O. Box. 812, Yaoundé, Cameroon., Souleyamanou A; Department of Plant Biology, Faculty of Science, University of Yaoundé I, P.O. Box. 812, Yaoundé, Cameroon., Ouhdouch Y; Laboratory of Microbial Biotechnologies, Agrosciences and Environment, (BioMAgE) Labeled Research Unit-CNRST N°4, Faculty of Sciences Semlalia, University Cadi Ayyad (UCA), Marrakech, BP 2390, Morocco., Hafidi M; AgroBiosciences Program, College of Agriculture and Environmental Sciences (CAES), Mohammed VI Polytechnic University (UM6P), Lot 660, Hay Moulay Rachid, Benguerir, 43150, Morocco.; Laboratory of Microbial Biotechnologies, Agrosciences and Environment, (BioMAgE) Labeled Research Unit-CNRST N°4, Faculty of Sciences Semlalia, University Cadi Ayyad (UCA), Marrakech, BP 2390, Morocco.; African Sustainable Agriculture Research Institute (ASARI), Mohammed VI Polytechnic University (UM6P), Laayoune, 7000, Morocco.
Jazyk: angličtina
Zdroj: BMC plant biology [BMC Plant Biol] 2023 Nov 21; Vol. 23 (1), pp. 582. Date of Electronic Publication: 2023 Nov 21.
DOI: 10.1186/s12870-023-04587-z
Abstrakt: Background: Arbuscular mycorrhizal and Trichoderma fungi alter the synthesis of secondary metabolites of plants and confer tolerance from pathogens attacks. However, there is less supportive evidence from on-field studies confirming the above-mentioned hypothesis, particularly for the humid forest zone of Cameroon where pathogens are important sources of yield losses for legumes such as soybean and common bean.
Materials and Methods: We evaluated the impacts of mycorrhiza isolates of Rhizophagus intraradices (Ri) and Trichoderma asperellum (Ta) fungi and their co-inoculations (Ta x Ri) in the synthetizing of leaves secondary metabolites, foliar disease symptoms, growth, N and P uptake, and yields of three genotypes of soybean (TGx 1485-1D, TGx 1990-93 F, and TGx 1990-97 F) and common beans (NUA-99, DOR-701, and PNN) under field conditions of Cameroon.
Results: We found that common bean plants showed a lower foliar infection rate but a higher increase in root colonization intensity, shoot dry weight, and N and P uptakes than soybeans when inoculated with Ri and Ta treatment. However, the grain yield of soybean soybean was higher (2000 kg ha 1 ) than the common bean plants for the Ri × Ta treatment. The soybean genotype TGx 1990-93F had increased root colonization intensity and the lowest foliar infection rate, making it stronger and tolerant to pathogen attacks when co-inoculated with Ri × Ta fungi (F). Bean plants inoculated with Ri and the co-inoculated with Ri × Ta demonstrated lower symptoms of foliar attack, and increased root colonization, particularly the PNN variety. The total amino acid and proline accumulations were higher for soybean than common bean plants due to fungi inoculations, and soybean genotypes accumulated more excellent contents of amino acid and proline in the control (10.1 mg g - 1 fwt) that significantly increased under the Ri × Ta inoculation (13.4 mg g - 1 fwt).
Conclusions: Common bean plants inoculated with Ta and Ri fungi accumulated higher phenolic compounds in their leaves that aided them in overcoming the pathogen attacks than soybean plants.
(© 2023. The Author(s).)
Databáze: MEDLINE
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