干旱区生态环境知识资源中心(Arid): Mitigation of salt stress damages in Carica papaya L. seedlings through exogenous pretreatments of gibberellic acid and proline

Arid

DOI	10.4067/S0718-58392022000100167
	Mitigation of salt stress damages in Carica papaya L. seedlings through exogenous pretreatments of gibberellic acid and proline
	Alvarez-Mendez, Sergio J.; Urbano-Galvez, Antonio; Mahouachi, Jalel
通讯作者	Mahouachi, J
来源期刊	CHILEAN JOURNAL OF AGRICULTURAL RESEARCH
ISSN	0718-5839
出版年	2022
卷号	82 期号:1
英文摘要	Salinity is a serious threat for global agriculture, especially in arid and semi-arid regions where its incidence leads to considerable damages in the crop growth and production. Carica papaya L. is currently one of the most cultivated fruit crops in the tropical and subtropical areas, and generally, papaya cultivars exhibit a moderate sensitivity to salinity, although such responses may depend on the genotypes. In the present study, papaya seedlings were subjected to salt stress (100 mM NaCl) for 41 d and to exogenous gibberellic acid (GA3; 0.1 mM) and proline (10 mM) pretreatments to evaluate plant physiological variables linked to stress responses. Analysis of the data (P < 0.05) showed a general decrease of plant growth parameters induced by solely salt stress compared to control, such as stem height (47%) and thickness (33%) and plant fresh and dry mass (84% and 83%, respectively), as well as a reduction in the stomatal opening (93%), chlorophylls (40%) and carotenoids (71%) concentration. By contrast, a significant increase was found in foliar and radicular proline levels under stress (87% and 47%). Exogenous foliar GA3 or proline respectively induced a better performance of plants under salt stress by increasing stomatal conductance (444% or 350%), stem height (142% or 144%) and plant biomass (49% or 41%) regarding solely stressed plants, and leading to pigments concentrations close to those from control plants. The results suggest that exogenous gibberellic acid and proline as growth regulator and osmo-regulator solute, respectively could increase papaya seedlings adaption against salt stress.
英文关键词	Photosynthetic pigments plant growth subtropics
类型	Article
语种	英语
开放获取类型	gold
收录类别	SCI-E
WOS记录号	WOS:000749709200001
WOS关键词	GROWTH ; GERMINATION ; YIELD
WOS类目	Agriculture, Multidisciplinary ; Agronomy
WOS研究方向	Agriculture
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/376728
推荐引用方式 GB/T 7714	Alvarez-Mendez, Sergio J.,Urbano-Galvez, Antonio,Mahouachi, Jalel. Mitigation of salt stress damages in Carica papaya L. seedlings through exogenous pretreatments of gibberellic acid and proline[J],2022,82(1).
APA	Alvarez-Mendez, Sergio J.,Urbano-Galvez, Antonio,&Mahouachi, Jalel.(2022).Mitigation of salt stress damages in Carica papaya L. seedlings through exogenous pretreatments of gibberellic acid and proline.CHILEAN JOURNAL OF AGRICULTURAL RESEARCH,82(1).
MLA	Alvarez-Mendez, Sergio J.,et al."Mitigation of salt stress damages in Carica papaya L. seedlings through exogenous pretreatments of gibberellic acid and proline".CHILEAN JOURNAL OF AGRICULTURAL RESEARCH 82.1(2022).