نتایج جستجو برای: pyrus communis

تعداد نتایج: 4358  

ژورنال: :تولید محصولات زراعی و باغی 0
اعظم نیکزاد قرهآغاجی a. nikzad gharehaghaji tarbiat modares university, tehran, iran.دانشگاه تربیت مدرس، تهران، ایران کاظم ارزانی k. arzani tarbiat modares university, tehran, iran.دانشگاه تربیت مدرس، تهران، ایران حمید عبداللهی h. abdollahi seed and plant improvement institute, karaj, iranموسسۀ تحقیقات اصلاح و تهیه نهال و بذر، کرج، ایران عبدالعلی شجاعیـان a. shojaeiyan tarbiat modares university, tehran, iran.دانشگاه تربیت مدرس، تهران، ایران لوکا دونـدینی l. dondini università degli studi di bologna, bologna, italy.دانشگاه بولونیا، بولونیا، ایتالیا پاولو دفرانچسـکی p. de franceschi università degli studi di bologna, bologna, italy.دانشگاه بولونیا، بولونیا، ایتالیا

گونه‎های گلابی، سیستم خودناسازگاری گامتوفیتی نشان می‎دهند که به‎طور گسترده‎ در میان گیاهان گل دار وجود دارد. این سیستم، از طریق مکانیزم شناسایی دانه‎ گرده - مادگی از خودباروری جلوگیری می‎کند. تنوع آلل‎های خودناسازگاری یافت شده در ژنوتیپ‎های ایرانی نشان دهندۀ ردپای ترکیب ژنتیکی معنی‎دار گونه‎های دیگر است؛ بنابراین، ژرم‎پلاسم ایران به‎عنوان بهترین منبع تنوع برنامه‎های به‎نژادی است. بدین منظور، در...

Journal: :Plant physiology 1987
J D Klein I B Ferguson

Uptake of Ca(2+) by suspension-cultured pear (Pyrus communis L. cv Passe Crassane) cells and protoplasts was significantly enhanced by exposure to 38 degrees C compared to 25 degrees C. The increased uptake was specific for Ca(2+) and was not due to cell wall binding. Tissues pretreated at 38 degrees C showed increased uptake even upon return to 25 degrees C. Treatment with carbonylcyanide m-ch...

Journal: :Plant physiology 1977
C Y Wang W M Mellenthin

Ripening reactions in pears (Pyrus communis L.) were differentially affected by an aminoethoxy analog of rhizobitoxine (l-2-amino-4-[2-aminoethoxy]-trans-3-butenoic acid) (AAR). Ethylene production of both ;Anjou' and ;Bartlett' pears was inhibited by AAR. Decrease in firmness, increase in protein N and soluble pectin were delayed by AAR in ;Anjou' but not in ;Bartlett' pears. While loss in mal...

Journal: :Plant physiology 1979
A Drouet C Hartmann

Polysome profiles were examined from lyophilized peel tissue of ripening pear (Pyrus communis, L. var. Passe-Crassane). Messenger RNA chains bearing up to eight ribosomes (octamers) were resolved and exhibited the highest absorption peak when ribonuclease activity was eliminated during extraction. Neither normal ripening nor the increase of large polyribosomes that normally accompanies ripening...

ارزانی, کاظم, دفرانچسـکی, پاولو , دونـدینی, لوکا, شجاعیـان, عبدالعلی , عبداللهی, حمید , نیکزاد قرهآغاجی, اعظم,

The Pyrus species exhibit the gametophytic self -incompatibility which is considered to be the most widespread self-incompatibility system among flowering plants. This system prevents self-fertilization through a specific pollen-pistil recognition mechanism. The S-allele diversity in the Iranian genotypes indicates that the pear germplasm of Iran can be an excellent source of variability for br...

Journal: :Plant physiology 1976
K L Tao A A Khan

The number of isoperoxidases and the intensity of certain isozymes increased with increasing periods of stratification of pear (Pyrus communis cv. Bartlett) embryos. The presence of GA(3) or kinetin during stratification enhanced the activity of certain isoperoxidases, and these enhancements were blocked in the presence of ABA which by itself had an inhibitory effect. Enhancement in isoperoxida...

Journal: :Agriculture 2022

The interactions between plants and pollinators are complex. Flower volatiles as special olfactory cues could influence the foraging choices of pollinators. Here, we conducted bioassays to evaluate role flower on attraction honey bees (native Apis cerana exotic mellifera) pears Pyrus bretschneideri communis). Chemical electrophysiological approaches were used determine antennal responses from p...

2014
David Chagné Ross N. Crowhurst Massimo Pindo Amali Thrimawithana Cecilia Deng Hilary Ireland Mark Fiers Helge Dzierzon Alessandro Cestaro Paolo Fontana Luca Bianco Ashley Lu Roy Storey Mareike Knäbel Munazza Saeed Sara Montanari Yoon Kyeong Kim Daniela Nicolini Simone Larger Erika Stefani Andrew C. Allan Judith Bowen Isaac Harvey Jason Johnston Mickael Malnoy Michela Troggio Laure Perchepied Greg Sawyer Claudia Wiedow Kyungho Won Roberto Viola Roger P. Hellens Lester Brewer Vincent G. M. Bus Robert J. Schaffer Susan E. Gardiner Riccardo Velasco

We present a draft assembly of the genome of European pear (Pyrus communis) 'Bartlett'. Our assembly was developed employing second generation sequencing technology (Roche 454), from single-end, 2 kb, and 7 kb insert paired-end reads using Newbler (version 2.7). It contains 142,083 scaffolds greater than 499 bases (maximum scaffold length of 1.2 Mb) and covers a total of 577.3 Mb, representing ...

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