Plant Process and Function
فرآیند و کارکرد گیاهی
Journal of Plant Process and Function
Agriculture
http://jispp.iut.ac.ir
1
admin
2322-2727
2383-3688
10.22034
fa
jalali
1400
4
1
gregorian
2021
7
1
10
43
online
1
fulltext
en
Effect of salicylic acid on salt tolerance of Aloe vera plants under both salt-acclimated and non-acclimated conditions
Effect of salicylic acid on salt tolerance of Aloe vera plants under both salt-acclimated and non-acclimated conditions
تنش شوري
Salt Stress
پژوهشي
Research
Since the role of salicylic acid (SA) in <em>Aloe vera</em> plants under salt stress is not yet clarified, this experiment was conducted to investigate the role of SA (100 and 500 μM) in photosynthesis, antioxidative capacity and ion homeostasis in salt acclimated (EC 6 dS/m) and non-acclimated <em>Aloe</em> plants against subsequent salt stress (EC 21 dS/m). Salinity exerted an adverse effect on the leaf dry weight, whereas foliar spray of 100 μM SA mitigated the salt-induced inhibitory effects on the plant growth, especially under acclimated conditions. While salt stress caused a significant increase in Na accumulation and a considerable decrease in K and Ca, higher levels of K/Na ratio was observed after SA treatment. SA application (100 μM) also alleviated the damage to PSII function induced by salt, contributing to the improvement of electron trapping under salinity. Furthermore, <em>Aloe </em>plants exposed to EC 21 dS/m exhibited an oxidative damage, determined by increased content of oxidants (hydrogen peroxide and malondialdehyde). In contrast, foliar spray of 100 μM SA increased CAT activity as well as carotenoids content, and reduced content of oxidants under salt stress. Consequently, under both salt-acclimated and non-acclimated conditions, SA at concentration of 100 μM was more effective in alleviation of salt stress in <em>Aloe</em> plants via the enhancement of photochemical activity of photosynthesis, the activities of antioxidant enzymes and the ratio of K and Na under salinity.
Aloe vera, antioxidant status, ion homeostasis, quantum yield of electron transport, photochemistry activity, salinity
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http://jispp.iut.ac.ir/browse.php?a_code=A-10-737-6&slc_lang=en&sid=1
Ali
Nakhaeia
Nakhaeia
nakhaeia@yahoo.com
100319475328460024248
100319475328460024248
No
Department of Biology, Payame Noor University (PNU), 19395-3697 Tehran, Iran
Ghader
Habibi
Habibi
gader.habibi@gmail.com
100319475328460024249
100319475328460024249
Yes
Department of Biology, Payame Noor University (PNU), 19395-3697 Tehran, Iran
Autosa
vaziri
Autosa
vaziri
vaziri@pnu.ac.ir
100319475328460024250
100319475328460024250
No
Department of Biology, Payame Noor University (PNU), 19395-3697 Tehran, Iran