Author(s): de Lima Rhein, Andressa Freitas [UNESP] ; Mathias dos Santos, Durvalina Maria [UNESP] ; Carlin, Samira Domingues
Date: 2014
Persistent ID: http://hdl.handle.net/11449/42620
Origin: Oasisbr
Subject(s): Abiotics stress; nitrogen; osmoprotector; root system; Saccharum spp.; Abiotics stress; Abiotics stress; nitrogen; nitrogen; osmoprotector; osmoprotector; root system; root system; Saccharum spp.; Saccharum spp.
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The aim of this work was evaluate the physiological indicators of association between water deficiency and soil acidity, by determining the nitrate reductase activity, the levels of free proline and initial growth of the root system of seedlings of sugarcane cv. IAC91-5155. After 30 days, the seedlings were transferred to plastic pots with 12 dm3 of dystrophic alic Red Latosol (Oxisol) and submitted to association of three treatments of water availability: no stress (70%), moderate stress (55%) and severe stress (40%), in according with field capacity and three acidity treatments: no stress (55%), moderate stress (33%) and severe stress (23%), considering the base saturation. The experimental design was that of random blocks under factorial scheme of 3x3, with four replicates. After 60 days under the stress association, the levels of free proline, the nitrate reductase activity and the growth of the sugarcane roots system were evaluated in seedlings of sugarcane. The nitrate reductase enzyme activity can be considered a physiological indicator of the effect of the association of acid and water stress in moderate conditions in soil, while the free proline can be considered physiological indicator to both stress in severe conditions. Water deficiency increasing reduced growth of sugarcane roots.
Agencia Paulista Tecnol Agronegocios, APTA Polo Ctr Oeste, Sao Jose do Rio Preto, SP, Brazil
Univ Estadual Paulista, UNESP, Fac Ciencias Agron, Jaboticabal, SP, Brazil
Univ Estadual Paulista, UNESP, Fac Ciencias Agr & Vet, Jaboticabal, SP, Brazil
Univ Estadual Paulista, UNESP, Fac Ciencias Agron, Jaboticabal, SP, Brazil
Univ Estadual Paulista, UNESP, Fac Ciencias Agr & Vet, Jaboticabal, SP, Brazil
