Silletti, Silvia and Di Stasio, Emilio and Van Oosten, Michael James and Ventorino, Valeria and Pepe, Olimpia and Napolitano, Mauro and Marra, Roberta and Woo, Sheridan Lois and Cirillo, Valerio and Maggio, Albino (2021) Biostimulant Activity of Azotobacter chroococcum and Trichoderma harzianum in Durum Wheat under Water and Nitrogen Deficiency. Agronomy, 11 (2). p. 380. ISSN 2073-4395
![[thumbnail of agronomy-11-00380-v2.pdf]](http://publish7promo.com/style/images/fileicons/text.png)
agronomy-11-00380-v2.pdf - Published Version
Download (4MB)
Abstract
Biostimulants hold great potential for developing integrated sustainable agriculture systems. The rhizobacteria Azotobacter chroococcum strain 76A and the fungus Trichoderma harzianum strain T22, with demonstrated biostimulant activity in previous systems, were evaluated in Triticum durum cv Creso for their ability to enhance growth and tolerance to drought stress. Growth and drought tolerance were evaluated in conditions of low and high soil nitrogen, with two levels of water stress. T. harzianum increased plant growth (+16%) under control conditions and tolerance to moderate drought stress (+52%) under optimal fertilization, while A. chroococcum conferred a growth penalty (−28%) in well-watered conditions under suboptimal fertilization and increased tolerance only under extreme drought stress (+15%). This growth penalty was ameliorated by nitrogen fertilization. T. harzianum abundance was found to be positively correlated to extreme soil drying, whereas A. chroococcum-induced tolerance was dependent on soil nitrogen availability. These results indicate that while biostimulants may enhance growth and stress tolerance, nutrient availability soil and environmental conditions heavily influence these responses. These interactions should be considered when designing biostimulant products targeted to specific cultural conditions.
Item Type: | Article |
---|---|
Subjects: | Euro Archives > Agricultural and Food Science |
Depositing User: | Managing Editor |
Date Deposited: | 16 Mar 2023 08:01 |
Last Modified: | 05 Jun 2024 09:23 |
URI: | http://publish7promo.com/id/eprint/1256 |