Seaweed Extracts Enhance Salam Turfgrass Performance during Prolonged Irrigation Intervals and Saline Shock

被引:86
作者
Elansary, Hosam O. [1 ,2 ]
Yessoufou, Kowiyou [2 ]
Abdel-Hamid, Amal M. E. [3 ]
El-Esawi, Mohamed A. [4 ]
Ali, Hayssam M. [5 ,6 ]
Elshikh, Mohamed S. [5 ]
机构
[1] Alexandria Univ, Fac Agr El Shatby, Floriculture Ornamental Hort & Garden Design Dept, Alexandria, Egypt
[2] Univ Johannesburg, Dept Geog Environm Management & Energy Studies, Johannesburg, South Africa
[3] Ain Shams Univ, Dept Biol & Geol Sci, Fac Educ, Cairo, Egypt
[4] Tanta Univ, Bot Dept, Fac Sci, Tanta, Egypt
[5] King Saud Univ, Bot & Microbiol Dept, Coll Sci, Riyadh, Saudi Arabia
[6] Agr Res Ctr, Inst Hort Res, Sabahia Hort Res Stn, Timber Trees Res Dept, Alexandria, Egypt
来源
FRONTIERS IN PLANT SCIENCE | 2017年 / 8卷
关键词
Paspalum vaginatum; drought; salinity; seaweed extract; Salam; antioxidants; SEASHORE PASPALUM CULTIVARS; ASCOPHYLLUM-NODOSUM; CREEPING BENTGRASS; OXIDATIVE STRESS; GENE-EXPRESSION; PHYSIOLOGICAL-RESPONSES; ANTIOXIDANT RESPONSES; COMMERCIAL EXTRACT; TRINEXAPAC-ETHYL; ABIOTIC STRESSES;
D O I
10.3389/fpls.2017.00830
中图分类号
Q94 [植物学];
学科分类号
071001 ;
摘要
The negative effects of the ongoing climate change include unusual prolonged droughts and increased salinity pressures on the agricultural lands. Consequently, crops are facing unprecedented environmental pressure, and this calls for more research toward controlling such major stresses. The current study investigates the effects of seaweed extract sprays of Ascophyllum nodosum (5 and 7 mL center dot L-1; 6 day intervals) on Paspalum vaginatum Salam' during prolonged irrigation intervals (2 and 6 day) and saline growing conditions (1 and 49.7 dS center dot m(-1)) for 6 weeks in containers under greenhouse conditions. Control plants showed reduced turf quality, photochemical efficiency, root length and dry weight, total non-structural carbohydrates, and K and Ca compositions. Seaweed extracts increased turf quality, leaf photochemical efficiency, root length and dry weight, total non-structural carbohydrates, K, Ca, and proline in treated plants during prolonged irrigation intervals as well as saline shock conditions. There were also increases in the antioxidant defensive mechanisms such as catalase (CAT), superoxide dismutase (SOD) and ascorbate peroxidase (APX) activities and non-enzymatic antioxidants as well as reduced lipid peroxidation. The application of SWE at 7 mL center dot L-1 showed higher performance in treated plants during prolonged irrigation intervals as well as saline conditions. Our findings imply that several mechanisms including drought tolerance, osmotic adjustment and antioxidant defense system may interact to enhance the performance of plants in the face of environmental stress following SWE treatments.
引用
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页数:14
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