Arid
DOI10.15835/nbha45110651
Physiological, Morphological Changes and Storage Root Yield of Sweetpotato [Ipomoea batatas (L.) Lam.] under PEG-Induced Water Stress
Yooyongwech, Suravoot1; Samphumphung, Thapanee2; Tisaram, Rujira2; Theerawitaya, Cattarin2; Cha-Um, Suriyan2
通讯作者Cha-Um, Suriyan
来源期刊NOTULAE BOTANICAE HORTI AGROBOTANICI CLUJ-NAPOCA
ISSN0255-965X
EISSN1842-4309
出版年2017
卷号45期号:1页码:164-171
英文摘要

Sweetpotato is an important tuberous root crop rich in nutrients such as vitamins and carbohydrates, and can grow well in arid regions with less water consuming crop. The aim of this research was to evaluate the storage root yields, physiological, biochemical and morphological traits in sweetpotato cv. ’Japanese Yellow’ subjected to polyethylene glycol (PEG)-induced water deficit. At harvest (4 months after planting) the number of storage roots per plant and storage root fresh weight in sweetpotato treated with 5% PEG (-0.54 MPa) in nutrient solution of hydroponic culture declined by 20.0% and 47.4% compared to the control without PEG, respectively. Leaf area and leaf dry weight significantly decreased by 85.6% and 95.3%, respectively when exposed to water deficit stress. Sucrose content (114.7 mg g(-1) dry weight; DW) in storage roots of sweetpotato grown under PEG-induced water deficit conditions was enriched by 2.2 fold of control (52.5 mg g(-1) DW) and was greater than in storage roots derived from soil culture (70.3 mg g(-1) DW). Total soluble sugar in the root and storage root tissues was enriched and may play a key role as osmotic adjustment (OA) in PEG-induced water stressed plants. Free proline and sucrose contents were also dominated in the leaf tissues to maintain the leaf osmotic potential in water stressed plants. In addition, chlorophyll degradation, chlorophyll fluorescence diminution and stomatal closure were found in plants grown under PEG-induced water deficit conditions, leading to reduction in net photosynthetic rate (Pn) and subsequently lesser amounts of glucose and fructose contents in the leaf tissues. Sucrose and free proline in the roots of sweetpotato play a key role as major osmotic adjustment when subjected to PEG-induced water deficit condition. Basic knowledge gained from this research will further be investigated the drought defense mechanism in sweetpotato via osmoregulation system.


英文关键词net photosynthetic rate osmotic adjustment polyethylene glycol (PEG) sucrose total soluble sugar
类型Article
语种英语
国家Thailand
收录类别SCI-E
WOS记录号WOS:000403394200022
WOS关键词INDUCED OSMOTIC-STRESS ; INDUCED DROUGHT STRESS ; X ENVIRONMENT INTERACTION ; SOIL-MOISTURE DEFICIT ; LINEAR GROWTH-RATE ; DAILY LIGHT PERIOD ; POLYETHYLENE-GLYCOL ; CHLOROPHYLL FLUORESCENCE ; SOLUTE ACCUMULATION ; GAS-EXCHANGE
WOS类目Plant Sciences
WOS研究方向Plant Sciences
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/201262
作者单位1.Mahidol Univ, Div Agr Sci, Kanchanaburi Campus, Kanchanaburi 71150, Thailand;
2.NSTDA, Natl Ctr Genet Engn & Biotechnol BIOTEC, Pathum Thani 12120, Thailand
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GB/T 7714
Yooyongwech, Suravoot,Samphumphung, Thapanee,Tisaram, Rujira,et al. Physiological, Morphological Changes and Storage Root Yield of Sweetpotato [Ipomoea batatas (L.) Lam.] under PEG-Induced Water Stress[J],2017,45(1):164-171.
APA Yooyongwech, Suravoot,Samphumphung, Thapanee,Tisaram, Rujira,Theerawitaya, Cattarin,&Cha-Um, Suriyan.(2017).Physiological, Morphological Changes and Storage Root Yield of Sweetpotato [Ipomoea batatas (L.) Lam.] under PEG-Induced Water Stress.NOTULAE BOTANICAE HORTI AGROBOTANICI CLUJ-NAPOCA,45(1),164-171.
MLA Yooyongwech, Suravoot,et al."Physiological, Morphological Changes and Storage Root Yield of Sweetpotato [Ipomoea batatas (L.) Lam.] under PEG-Induced Water Stress".NOTULAE BOTANICAE HORTI AGROBOTANICI CLUJ-NAPOCA 45.1(2017):164-171.
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