African Journal of
Agricultural Research

  • Abbreviation: Afr. J. Agric. Res.
  • Language: English
  • ISSN: 1991-637X
  • DOI: 10.5897/AJAR
  • Start Year: 2006
  • Published Articles: 6578

Full Length Research Paper

Root-promoting substances enhance Sugarcane's drought tolerance

Lauricio Endres
  • Lauricio Endres
  • Laboratory of Plant Physiology, Agrarian Sciences Center – Av. Lourival Melo Mota, n/n, Cidade Universitária - Maceió - AL, Federal University of Alagoas (UFAL), Brazil.
  • Google Scholar
Humberto Cristiano de Lins Wanderley Filho
  • Humberto Cristiano de Lins Wanderley Filho
  • Laboratory of Plant Physiology, Agrarian Sciences Center – Av. Lourival Melo Mota, n/n, Cidade Universitária - Maceió - AL, Federal University of Alagoas (UFAL), Brazil.
  • Google Scholar
Paulo Ricardo Aprígio Clemente
  • Paulo Ricardo Aprígio Clemente
  • Laboratory of Plant Physiology, Agrarian Sciences Center – Av. Lourival Melo Mota, n/n, Cidade Universitária - Maceió - AL, Federal University of Alagoas (UFAL), Brazil.
  • Google Scholar
Breno Kennedy Lima Bezerra
  • Breno Kennedy Lima Bezerra
  • Department of Crop Science, College of Agricultural Science, São Paulo State University (UNESP), José Barbosa de Barros Road, 1780, P. O. Box 237, 18603-970, Botucatu, State of São Paulo, Brazil.
  • Google Scholar
Vilma Marques Ferreira
  • Vilma Marques Ferreira
  • Laboratory of Plant Physiology, Agrarian Sciences Center – Av. Lourival Melo Mota, n/n, Cidade Universitária - Maceió - AL, Federal University of Alagoas (UFAL), Brazil.
  • Google Scholar


  •  Received: 04 November 2016
  •  Accepted: 07 December 2016
  •  Published: 29 December 2016

Abstract

Sugarcane (Saccharum spp) is an expanding culture for the production of bioethanol around the world which requires certain practices to improve its productive performance at the different ecosystems. This work's aim is to evaluate the initial Sugarcane growth and drought tolerance through the application of biostimulants. For this purpose an experiment was conducted in a greenhouse using completely randomized design. Prior to planting, the cuttings were treated with: T1 - Water; T2 - Indolebutyric Acid (IBA); T3 - Boron + Zinc; T4 - Tryptophan; T5 - Kymon Plus® + Potamol®; and T6 - Stimulate®. Morphological analysis was performed at 40 and 124 days after planting (DAP) to assess the plant initial growth. The biostimulants effect on drought stress mitigation was evaluated at 120 DAP, after 3 days of suppression irrigation. The IBA and Stimulate® application delivered higher growth rates and biomass accumulation. When compared to Control treatment, the application of Ubyfol® and Stimulate® provided higher photosynthesis in the absence of drought stress and had higher PSII effective quantum yield even when plants were under drought stress. The application of Stimulate® enabled plants to maintain higher photosynthetic, transpiration and stomatal conductance rates under moderate drought stress.

Key words: Drought stress, photosynthesis, Saccharum spp, transpiration