eHALOPH - Halophytes Database

Publication Type	J
Authors	Khan, F; Adnan, MY; Aziz, I
Author Full Name	Khan, Farzeen; Adnan, Muhammad Yousuf; Aziz, Irfan
Title	METABOLIC IMPLICATIONS OF SALT INDUCED OSMOLYTE ACCUMULATION IN AVICENNIA MARINA
Source	PAKISTAN JOURNAL OF BOTANY
Language	English
Document Type	Article
Author Keywords	Glycinebetaine; Ions; Mangroves; Sugars; Osmolytes; Stress
Keywords Plus	SALINITY TOLERANCE; OSMOTIC ADJUSTMENT; WATER-STRESS; CHEMICAL-COMPOSITION; AUSTRALIAN MANGROVES; NACL CONCENTRATIONS; ORGANIC OSMOLYTES; ION-TRANSPORT; HIGHER-PLANTS; WHEAT LEAVES
Abstract	Salt induced solute accumulation is a well known feature for osmotic adjustment in plants under salt stress. Concomitantly, synthesis of compatible osmolytes requires energy which may compromise plant growth. This study highlights the contribution of different solutes to leaf osmolality in Avicennia marina seedlings and saplings and possible metabolic shifts under saline conditions. Salinity was imposed using different seawater strengths (0, 50% & 150% seawater salinity) to evaluate contribution of ions and organic osmolytes and their possible effects on plant growth. Optimum growth was found in 50% seawater salinity (SWS) and decreased under salt stress (150% SWS). Low values for water and osmotic potential could be accounted for an increase in the amount of Na+ which appeared to contribute the most in leaf osmolality in both seedlings (38%) and saplings (43%) under saline conditions. Among tested organic solutes, the contribution of total soluble sugars (TSS) was higher in non-saline control and moderate salinity, followed by glycinebetaine (GB) while proline (PRO) values were lowest. The amount of GB increased to a 4 fold in seedlings and 2 fold in saplings under salt stress. The increased ratio of GB: TSS in seedlings under salt stress indicates their sensitivity over saplings and a likely metabolic shift at the cost of growth.
Author Address	[Khan, Farzeen; Adnan, Muhammad Yousuf; Aziz, Irfan] Univ Karachi, Inst Sustainable Halophyte Utilizat, Karachi 75270, Pakistan; [Adnan, Muhammad Yousuf] Govt Sci & Commerce Coll, Landhi Korangi 6, Karachi 74900, Pakistan
Reprint Address	Aziz, I (reprint author), Univ Karachi, Inst Sustainable Halophyte Utilizat, Karachi 75270, Pakistan.
E-mail Address	irfanaziz@uok.edu.pk
Funding Agency and Grant Number	HEC (Higher Education Commission of Pakistan)
Funding Text	Authors would like to thank HEC (Higher Education Commission of Pakistan) for provision of funds under a research grant entitled
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Cited Reference Count	73
Publisher	PAKISTAN BOTANICAL SOC
Publisher City	KARACHI
Publisher Address	DEPT OF BOTANY UNIV KARACHI, 32 KARACHI, PAKISTAN
ISSN	0556-3321
29-Character Source Abbreviation	PAK J BOT
ISO Source Abbreviation	Pak. J. Bot.
Publication Date	FEB
Year Published	2016
Volume	48
Issue	1
Beginning Page	29
Ending Page	36
Page Count	8
Web of Science Category	Plant Sciences
Subject Category	Plant Sciences
Document Delivery Number	DI3IL
Unique Article Identifier	WOS:000373392200004
Plants associated with this reference	Avicennia marina