cold stress is one of the limiting factors in production of greenhouse vegetables. chemicals offer useful approach to reduce low temperature-induced damages. this study was conducted to evaluate the effect of foliar application of methyl jasmonate (meja) at concentrations of 0 (control), 50, 100, 200 µm) on electrolyte leakage (el), relative water content (rwc), soluble carbohydrates, proline, ...

The influence of individual or combined treatments of the chloroacetanilide herbicide preti­ lachlor and the safener fenclorim on glutathione content and the activity of glutathione reduc­ tase (GR, EC 1.6.4.2) and glutathione-S-transferase (GST, EC 2.5.1.18) of rice (O ryza sativa L., var. Lamont) was investigated in a time-course study including 0, 12, 24, 48, and 72 h peri­ ods after treatme...

The experiment was conducted at the Agronomy field of Sher-e-Bangla Agricultural University, Dhaka, Bangladesh during August, 2008 to January 2009 to find out the optimum plant spacing and number of seedling per hill in relation to tillering and dry matter accumulation of transplanted rice plant. The experiment was carried out with three plant spacings (S =15 cm × 20 cm, S = 20 cm × 20 cm and S...

Endogenous brassinosteroids (BRs) in tomato (Lycopersicon esculentum) seedlings are known to be composed of C27- and C28-BRs. The biosynthetic pathways of C27-BRs were examined using a cell-free enzyme solution prepared from tomato seedlings that yielded the biosynthetic sequences cholesterol --> cholestanol and 6-deoxo-28-norteasterone <--> 6-deoxo-28-nor-3-dehydroteasterone <--> 6-deoxo-28-no...

a major portion of the iranian fig (ficus carica) industry is located in high-salinity regions, and salinity is an important limiting factor in the production of this fruit. the present study was conducted to investigate the changes of leaf antioxidant-enzyme activity, proline and total protein content in two fig cultivars with two leaf shapes: ‘anjir sabz’ with lobate and palmate leaves, and ‘...

A major portion of the Iranian fig (Ficus carica) industry is located in high-salinity regions, and salinity is an important limiting factor in the production of this fruit. The present study was conducted to investigate the changes of leaf antioxidant-enzyme activity, proline and total protein content in two fig cultivars with two leaf shapes: ‘Anjir Sabz’ with lobate and palmate leaves, and ‘...

Changes in the amount of P700-chlorophyll a protein complex, plastocyanin, and cytochrome b(6)/f complex during greening of pea (Pisum sativum L.), wheat (Triticum aestivum L.), and barley (Hordeum vulgare L.) leaves were analyzed by an immunochemical quantification method. Neither subunit I nor II of P700-chlorophyll a protein complex could be detected in the etiolated seedlings of all three p...

In Clark and Shelby soybean (Glycine max [L.] Merr.) seedlings, hypocotyl elongation was inhibited and hypocotyl swelling and root dry weight were increased by a temperature of 25 C. At 20 and 30 C, development was normal, as was development of Hawkeye and Mandarin soybean seedlings at all three temperatures. Dry matter distribution at 9 days indicates that inhibition of hypocotyl elongation is...

sulforaphane (sfn) is an isothiocyanate which is produced through glucoraphanin hydrolysis via myrosinase activity. in the present study, sfn content and peroxidase activity has been assessed in treated lepidium draba seedlings with different concentrations of iron and copper during 8 and 16 hours treatment. the results showed that the sfn content drastically elevated at treatment with 1 mg/l f...