Showing 5 results for Coriander
Elham Asadi Karam, Batool Keramat, Zahra Asrar, Hossein Mozafari,
Volume 5, Issue 17 (9-2016)
Abstract
Triacontanol (TRIA), a plant growth regulator that is effective in reducing the effects of abiotic stresses. In order to investigation the effects of interaction between arsenic and TRIA treatment on some physiological indicators of coriander the present study carried out based on a factorial experiment in a completely randomized design with three replications. Factors of experiment include in different concentrations TRIA (0, 5, 10 and 20 &muM) and different levels of oxidative stress induced by arsenic (150 and 300 &muM). Arsenic treatment caused a significant accumulation of hydrogenperoxide(H2O2), a significant increasing in lipid peroxidation, increasing of proline, soluble sugars and enhancing the activity of antioxidant enzymes, GPX, APX and reduction the content of chlorophyll a, b and total chlorophyll in leaf plant. Simultaneous Treatment of TRIA and arsenic, decreased the amount of hydrogen peroxide and lipid peroxidation , and also reduced the amount of proline and soluble sugars in the plant, while it resulted in increasing the amount of chlorophyll a, b , total chlorophyll and the activity of antioxidant enzymes in the plant and these results showed the significant role of TRIA coriander plant in protection against heavy metal arsenic, which is through the activation of antioxidant enzymes.
Elham Asadikaram, Batool Keramat,
Volume 5, Issue 18 (12-2016)
Abstract
Heavy metals are the cause of major abiotic stresses in plants and a principal contributor to environmental pollution in recent decades. This study investigated the effects of exogenous hydrogen sulfide on the ascorbate-glutathione cycle in the leaves of coriander seedlings under copper stress. Results showed that copper stress not only reduced APX and GR activities but also decreased leaf AsA, DHA, and GSH contents. Pretreatment with sodium hydrosulfide (NaHS), a hydrogen sulfide (H2S) donor, was observed to enhance both GR activity and AsA, GSH, and DHA contents under copper stress. Moreover, the pretreatment decreased the malondialdehyde content and electrolyte leakage induced by copper stress in plants. Based on the results obtained, it was hypothesized that exogenous hydrogen sulfide alleviates oxidative damage under copper stress by regulating the ascorbate-glutathione cycle and, further, that H2S plays an important role in the acquisition of copper stress tolerance in coriander seedlings. Exogenous hydrogen sulfide is, therefore, identified as an agent with the potential to be used as a regulator to improve crop tolerance under copper stress.
Keywords: Copper stress, Coriander, Hydrogen sulfide, Ascorbate, Glutathione.
Morteza Eskandari, Safoora Saadati, Shadab Panahi, Ghasem Akhbarfar, Cyrus Ghobadi,
Volume 8, Issue 30 (5-2019)
Abstract
An experiment was conducted to study the effect of methyl jasmonate (MJ) on salinity stress alleviation of coriander plantlet. The experiment was set up as factorial experiment in completely randomized design with two factors including NaCl concentration (0, 3 and 6 ds/m) and MJ at three levels (0, 0.25 or 0.5 mM). The results showed that salt stress decreased fresh and dry weight of aerial, concentation of potassium,
K/Na ratio, carotenoid, antioxidant capacity and catalase. Parameters such as
ion leakage and concentation of aerial sodium increased by salinity stress. Application of MJ decreased ion leakage and sodium of aerial, improved fresh and dry weight of aerial, K/Na ratio, antioxidant capacity and catalase. Improved stress indexes in MJ-treated plantlets showed that applied of MJ ameliorated the adverse effects of injury caused by salt stress.
Mahdieh Semsarzadeh, Saeed Sayfzadeh, Davod Darvishi Zeidabadi, Hamidreza Zakerin, Esmaeil Hadidi Masouleh,
Volume 12, Issue 53 (5-2023)
Abstract
The aim of this experiment was to investigate the effect of zeolite on biochemical and physiological properties of coriander under drought stress in factorial form in a randomized complete block design with 4 replications during the two cropping years of 2017-2018 and 2018-2019. Drought stress at 3 levels (including: 100% water requirement (no stress), 75% water requirement (mild stress) and 50% water requirement (severe stress)) and zeolite consumption at 5 levels (no use, 2, 4, 6 and 8 t. ha-1 of zeolite) were applied. The results showed that the water deficit stress decreased plant height drought, fresh and dry weight of shoots significantly; However, with the application of zeolite, the effects of stress were somewhat reduced. The highest and lowest shoot dry weight was obtained, in normal irrigation (without stress) with the use of six tons of zeolite per hectare (2.99 g. plant-1) and in drought conditions (50% water requirement) without the use of zeolite (1.22 g. plant-1), respectively. Reduction of irrigation also increased proline, while application of zeolite reduced drought effects slightly. Normal irrigation and consumption of six tons per hectare of zeolite showed the lowest amount of proline and severe stress (irrigation 50% of water requirement) and non-consumption of zeolite showed the highest amount of proline. In general, it was gained an acceptable economic yield in the coriander plants by applying mild stress (75% of water requirement) and using six tons per hectare of zeolite, as well as reduces the effects of stress.
Neda Amiri, Najmeh Zeinalipour , Zahra Pakkish ,
Volume 13, Issue 61 (7-2024)
Abstract
Coriander (Coriandrum sativum L.) is used as an aromatic and medicinal vegetable. Plant growth regulators improve plant performance under unfavorable conditions. In this study, the interaction effects of 24-epibrassinolide (0, 0.5 and 1 µM) and three levels of drought stress (-2, -3.5 and -4.5 bars) were investigated on growth parameters and coriander leaves essential oil. The highest main stem length, diameter, shoot fresh weight, and shoot dry weight were obtained by 0.5 µM of 24-epibrassinolide (EBR) under -3.5 bar. Both 0.5 and 1 µM concentrations of 24-epibrassinolide protected leaves of chlorophyll a and b against the effects of water deficit. The plants under -3.5 and -4.5 bar water deficits showed more leaf electrolyte leakage compared to the control (-2 bar). The highest percentage of all six measured essential oil components (linalool, (e)-2-decenal, 2-hexa-decenal, carvone, α-pinene and (E)-2-dodecenal) were obtained under moderate and severe levels of regulated water deficit. Foliar spray of EBR 0.5µM under severe drought stress with -4.5 bar of matric potential increased the main essential oil compositions such as linalool, (E)-2-decenal and (E)-2-hexa-decenal.
