Volume 8, Issue 32 (vol. 8, no. 32. 2020 2019)                   j.plant proc. func. 2019, 8(32): 1-18 | Back to browse issues page

XML Persian Abstract Print


Download citation:
BibTeX | RIS | EndNote | Medlars | ProCite | Reference Manager | RefWorks
Send citation to:

Ehsanzadeh P, Gholami Zali A. Physiological, antioxidative and yield responses of three fennel genotypes to exogenous proline under drought stress condition. j.plant proc. func.. 2019; 8 (32) :1-18
URL: http://jispp.iut.ac.ir/article-1-980-en.html
1- , ehsanzadehp@gmail.com
Abstract:   (1700 Views)
Proline is an amino acid with a crucial role in ameliorating environmental stresses, including drought. In order to study the effect of external proline on the response of fennel to drought stress, three fennel genotypes (namely Urmia, Shiraz, and Kerman) were exposed to two levels of irrigation, i.e. control (34-45% of maximum allowable depletion in soil water) and drought (75-85% of maximum allowable depletion in soil water) and two levels of foliar-applied proline (0 and 20 mM) in a 4-replicate factorial randomized complete block pot experiment. Drought led to significant decreases in chlorophyll (Chl) and carotenoids (Cars) concentrations, leaf relative water content (RWC), ascorbate peroxidase (APX) and peroxidase (POX) activities, leaf water potential (ѱw), plant dry mass (DM) and seed weight and significant increases in leaf proline and polyphenols concentrations, and catalase (CAT) activity. Foliar-applied proline resulted in significant increases in membrane stability index (MSI), RWC, ѱw, proline and polyphenols concentrations, APX activity, plant DM and seed weight but it led to significant decreases in CAT and POX activities. Genotype Urmia out-numbered the remaining genotypes in terms of Chl and Cars concentrations, MSI, CAT and APX activities. There were significant correlations between leaf proline concentration and plant DM and seed weight under drought condition. Foliar-applied proline affected Chl and Cars differently in the drought-stressed and non-stressed plants. Furthermore, it affected plant seed weight in a genotype-dependent manner, as evidenced by 150% and 110% increases in Urmia and Shiraz and a 42.5% decrease in Kerman. It may be concluded that drought suppresses fennel growth, but foliar-applied proline is potent to mitigate the depression through increasing the leaf Chl, Cars, proline, and polyphenols concentrations, RWC and certain antioxidative enzymes activities in genotypes such as Urmia and Shiraz.
Full-Text [PDF 692 kb]   (436 Downloads)    
Type of Study: Research | Subject: Drougth Stress
Received: 2018/01/7 | Accepted: 2018/04/27 | Published: 2020/01/19

Add your comments about this article : Your username or Email:
CAPTCHA

Send email to the article author


© 2021 All Rights Reserved | Journal of Plant Process and Function

Designed & Developed by : Yektaweb