Recycled Wastewater and Reverse Osmosis Brine Use for Halophytes Irrigation: Differences in Physiological, Nutritional and Hormonal Responses of Crithmum maritimum and Atriplex halimus Plants

Agronomy

Sebastián Bañón¹  MaríaFernanda Ortuño²  MaríaJesús Sánchez-Blanco²  MaríaJosé Gómez-Bellot²  Beatriz Lorente²  Ángel Gil-Izquierdo³  Sonia Medina³ 

[1] Department of Agricultural Engineering, UPCT—Technical University of Cartagena, 30203 Cartagena, Spain;Department of Irrigation, Centro de Edafología y Biología Aplicada del Segura (CEBAS-CSIC), P.O. Box 164, 30100 Espinardo-Murcia, Spain;Research Group of Quality, Safety and Bioactivity of Plant Foods, Food Science and Technology Department, Centro de Edafología y Biología Aplicada del Segura (CEBAS-CSIC), P.O. Box 164, 30100 Espinardo-Murcia, Spain;

关键词: salinity;    non-conventional irrigation;    water status;    photosynthetic efficiency;    plant nutrition;    phytohormones;   

DOI  :  10.3390/agronomy11040627

来源: DOAJ

【 摘 要 】

Halophytes are capable of coping with excessive NaCl in their tissues, although some species may differ in their degree of salt tolerance. In addition, it is not clear whether they can tolerate other confounding factors and impurities associated with non-conventional waters. The experiment was performed in a greenhouse with Crithmum maritimum and Atriplex halimus plants, growing on soil and irrigated with two different water types: reclaimed wastewater (RWW) (EC: 0.8–1.2 dS m⁻¹) and reverse osmosis brine (ROB) (EC: 4.7–7.9 dS m⁻¹). Both species showed different physiological and nutritional responses, when they were irrigated with ROB. Atriplex plants reduced leaf water potential and maintained leaf turgor as consequence of an osmotic adjustment process. Atriplex showed higher intrinsic water use efficiency than Crithmum, regardless of the type of water used. In Crithmum, the water status and photosynthetic efficiency were similar in both treatments. Crithmum presented a higher leaf accumulation of B and Ca ions, while Atriplex a higher amount of K, Mg, Na and Zn. Crithmum plants irrigated with ROB presented higher concentrations of 1-aminocyclopropane-1-carboxylic acid and trans-zeatin-glucoside, whereas abscisic acid concentration was lower. Atriplex showed a lower concentration of trans-zeatin-riboside and scopoletin. The characteristics associated to water irrigation did not influence negatively the development of any of these species, which confirms the use of brine as an alternative to irrigate them with conventional waters.

【 授权许可】

Unknown