Plant Growth-Promoting Bacteria Enhance Survival, Growth, and Nutritional Content of Sugarcane Propagated through Pre-Sprouted Seedlings under Water Deficit
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Published:2024-01-26
Issue:2
Volume:14
Page:189
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ISSN:2077-0472
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Container-title:Agriculture
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language:en
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Short-container-title:Agriculture
Author:
Almeida Laura Costa Oliveira1ORCID, Santos Hariane Luiz1, Nogueira Carlos Henrique de Castro1, Carnietto Melina Rodrigues Alves1, Silva Gustavo Ferreira da1, Boaro Carmen Sílvia Fernandes2ORCID, Silva Marcelo de Almeida1ORCID
Affiliation:
1. Laboratory of Ecophysiology Applied to Agriculture (LECA), School of Agricultural Sciences, UNESP—São Paulo State University, Botucatu 18610-034, SP, Brazil 2. Biodiversity and Biostatistics Department, Institute of Biosciences, UNESP—São Paulo State University, Botucatu 18610-034, SP, Brazil
Abstract
Sugarcane plays a crucial role in global sugar and ethanol production. Conventionally, sugarcane propagation involves planting billets. However, Brazilian researchers have introduced the innovative pre-sprouted seedlings (PSS) method, widely used in the MEIOSI (Simultaneously Occurring Interrotational Method) system. Although PSS has several advantages over the conventional method, its sensitivity to water scarcity is a challenge. This study aimed to evaluate the survival and growth of PSS inoculated with Bacillus licheniformis and Bacillus subtilis (PGPB) under different water regimes. The experiment was conducted in the field in a randomized block in strips (split-block) using a 2 × 4 factorial scheme consisting of two inoculation conditions (with and without PGPB) and four water regimes (WR) (0%, 33%, 66%, and 100% of the ideal irrigation). PGPB increased PSS survival (4.17%) and water use efficiency (185.10% under the 0% WR). In addition, inoculation increased root (12.5%, 7.7%, and 16.2% for surface area, area projection, and root volume, respectively) and shoot growth. PGPB also increased nutrient uptake, such as N (60.8% and 18.3% under 0% and 66% WR), P (on average 11.7%), Mn (27.6% and 28.7% under 66% and 100% WR), Zn (111.4% under 0% WR), and Cu accumulation (27.17%), which provided a higher number of stalks per meter and, therefore, a higher multiplication rate in the MEIOSI system. Inoculation proved to be a promising alternative for PSS establishing under water restriction.
Funder
Agricultural and Forestry Studies and Research National Council for Scientific and Technological Development Coordination of Superior Level Staff Improvement
Subject
Plant Science,Agronomy and Crop Science,Food Science
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