干旱区生态环境知识资源中心(Arid): Differential agro-physiological responses induced by partial root-zone drying irrigation in olive cultivars grown in semi-arid conditions

Arid

DOI	10.1016/j.envexpbot.2019.103863
	Differential agro-physiological responses induced by partial root-zone drying irrigation in olive cultivars grown in semi-arid conditions
	Abboud, Samia 1,2; Dbara, Soumaya 3; Abidi, Walid 4; Braham, Mohamed 2
通讯作者	Abboud, Samia
来源期刊	ENVIRONMENTAL AND EXPERIMENTAL BOTANY
ISSN	0098-8472
EISSN	1873-7307
出版年	2019
卷号	167
英文摘要	Olive cultivation is mostly practiced under Mediterranean agro-ecosystems with limited availability of water. With current climate change conditions, water scarcity will continue to challenge agricultural sustainability. Therefore, great emphasis is placed on irrigation management in arid regions with the aim of increasing water use efficiency. The present study was conducted during two growing seasons (2015 and 2016) consisting of a low yields year ('Off' year) and a high yields year ('On' year), respectively. The photosynthetic performance in terms of gas exchange and chlorophyll fluorescence, as well water status, vegetative growth and yield responses of three olive cultivars (Arbequina, Arbosana and Chetoui) grown under partial root zone drying (PRD) irrigation in semi-arid conditions of Tunisia were investigated. Olive trees were subjected to four irrigation treatments which corresponded to control irrigated at 100% of the crop evapotranspiration (100%ETC) on both sides of the root system and three PRD treatments. These later were irrigated on a 14-day alternating cycle on one side of the root system and received respectively 100%, 75% and 50% of the control (100%PRD, 75%PRD and 50%PRD). In 'Off' year shoot length was lower in PRD irrigated trees than in control trees, mainly for Arbequina and Chetoui cultivars and the lowest values were associated with 50%PRD treatment. However, in 'On' year shoot length increased slightly for all treatments, whereas remained lower under PRD irrigation treatments. Relating to water status, all cultivars under PRD treatments show a clear decrease in stem water potential (Psi(stem)) and relative water content (RWC). A clear difference in the regulation of leaf gas exchange parameters under different irrigated regimes was observed between the studied cultivars. Results indicated that the PRD induced a decrease in maximum efficiency of photosystem II (Fv/Fm), effective efficiency of PSII (Phi PSI), stomatal conductance (g(s)) and transpiration rate (E). Nevertheless, this decrease did not limit the overall photosynthesis process mainly in the two cultivars Arebquina and Chetoui; since assimilation rates and intrinsic water use (WUEI) still maintained under 50%PRD treatment independently of the decreased value of fluorescence parameters. Furthermore, reducing irrigation volumes by 25% (75% PRD) and 50% (50% PRD) compared to the control (100%ETC) increased oil yield and water productivity mainly for Arbequina cultivar without significant reductions on yield components. Based on agronomic and physiological adaptations to reduce water loss, it can be concluded that Arbequina is very promising for cultivation under PRD irrigation strategy compared to Arbosana and Chetoui.
英文关键词	Olea europaea L. PRD irrigation Vegetative growth Yield Water status Gas exchange Chlorophyll fluorescence
类型	Article
语种	英语
国家	Tunisia
收录类别	SCI-E
WOS记录号	WOS:000487174700024
WOS关键词	OLEA-EUROPAEA L. ; REGULATED DEFICIT IRRIGATION ; WATER-USE EFFICIENCY ; IN-FIELD CONDITIONS ; CHLOROPHYLL FLUORESCENCE ; FRUIT-QUALITY ; GAS-EXCHANGE ; YIELD RESPONSES ; CARBON ASSIMILATION ; STOMATAL APERTURE
WOS类目	Plant Sciences ; Environmental Sciences
WOS研究方向	Plant Sciences ; Environmental Sciences & Ecology
EI主题词	2019-11-01
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/310696
作者单位	1.Univ Sousse, Inst Agr Res & Higher Educ IRESA, Higher Agron Inst Chott Mariem, Sousse 4042, Tunisia; 2.Olive Tree Inst, Unit Sousse, PB 14 Ibn Khaldoun St, Sousse 4061, Tunisia; 3.Reg Res Ctr Hort & Organ Agr, PB 57 Chott Mariem, Sousse 4042, Tunisia; 4.Reg Ctr Agr Res, PB 357, Sidi Bouzid 9100, Tunisia
推荐引用方式 GB/T 7714	Abboud, Samia,Dbara, Soumaya,Abidi, Walid,et al. Differential agro-physiological responses induced by partial root-zone drying irrigation in olive cultivars grown in semi-arid conditions[J],2019,167.
APA	Abboud, Samia,Dbara, Soumaya,Abidi, Walid,&Braham, Mohamed.(2019).Differential agro-physiological responses induced by partial root-zone drying irrigation in olive cultivars grown in semi-arid conditions.ENVIRONMENTAL AND EXPERIMENTAL BOTANY,167.
MLA	Abboud, Samia,et al."Differential agro-physiological responses induced by partial root-zone drying irrigation in olive cultivars grown in semi-arid conditions".ENVIRONMENTAL AND EXPERIMENTAL BOTANY 167(2019).