یکی از فعالیت­های مهم سلول­های گیاهی در دوره رشد آن، فعال نمودن ژن­های عامل و آنزیم­های موثر در تجزیه برخی مواد ذخیره شده در مراحل اولیه تشکیل میوه است. بر اساس مطالعات انجام شده، آنزیم­های مختلفی در تخریب دیواره سلولی و نرم شدن بافت میوه نقش دارند. از مهم­ترین این آنزیم­ها، آنزیم پکتات لیاز می­باشد. در این مطالعه، cdna ناقص یکی از ژن­های پکتات لیاز از بافت حبه انگور بی­دانه سفید (vitis vinifer...

Background and purpose: Monitoring quality of rivers water and awareness of its health status over time and identifying vulnerable zones are considered as essential steps towards sustainable development and efficient management of the environment. This study used multivariate statistical methods for analyzing water quality and awareness of rivers state in the Mazandaran province, Iran. Materia...

تولید و معرفی ارقام پرمحصول و مقاوم به خشکی در محصولات زراعی یکی از راهکارهای موثری است که در تلفیق با سایر روش‌های مدیریت کم آبی می‌تواند تأثیر این پدیده را به حداقل برساند. تحقیق حاضر با این هدف روی 18 ژنوتیپ برتر آزمایشات مقایسه عملکرد به همراه دو شاهد سرداری و آذر-2 در دو منطقه کرمانشاه (ایستگاه سرارود) و مراغه (ایستگاه مراغه) به‌مدت سه سال زراعی (84-1381) و در شرایط رطوبتی متفاوت (دیم، یک‌...

Phytophthora root and crown rot of safflower (Carthamus tinctorius) is regarded as one of the main soilborn diseases of this crop in Iran. Sampling and isolating of the causal agent was performed from farms in Ghazvin, Karaj and Isfahan. A frequently isolated oomycete called Phytophthora drechsleri was determined as the major pathogen of the disease. Twenty different genotypes of safflower were...

Major rock units of Robat Sefid ophiolitic complex are Late Cretaceous in age. The abundance of rock units in this area in ascending order are: dunit, harzburgite and pyroxenite), gabbro and diabasic dikes (mostly rudenginized). Chromite lenses are generally covered by a few centimeters to several meters of ultramafic rocks mainly of dunite. Primary disseminated and massive textures are abundan...

This study was conducted to evaluate the capability of reversed-phase high performance liquid chromatography (RP-HPLC) of wheat (Triticum aestivum L.) storage proteins, and their genetic variability in different winter and spring isolines, cultivars and landraces. Gliadin proteins were extracted from the flour of five randomly selected seeds of each genotype. In this method, Nucleosil C18 300 A...

Seedlessness is the most important characteristic of fruit quality for raisin and table grapes. Grape breeding at University of Tehran, Karaj branch, Iran started in 1999 with crossing some selected seedless and seeded cultivars at the end of evaluation of 90 cultivars in grapevine collection of College of Agriculture in Karaj. Out of 1400 progeny obtained from 26 different crosses, 381 of them...