نتایج جستجو برای: pollen viability

تعداد نتایج: 86028  

2017
Junpeng Mu Yulian Yang Yanling Luo Ruijun Su Karl J Niklas

Gentiana leucomelaena manifests dramatic flower color polymorphism, with both blue- and white-flowered individuals (pollinated by flies and bees) both within a population and on an individual plant. Previous studies of this species have shown that pollinator preference and flower temperature change as a function of flower color throughout the flowering season. However, few if any studies have e...

Journal: :journal of agricultural science and technology 2010
s. m. h. mortazavi k. arzani a. moini

iran is one of the main date (phoenix dactylifera) producing countries in the world. however, little information is available on the pollen viability and favorable storage conditions of iranian male date cultivars. this study was conducted to estimate the best in vitro pollen germination of three male date palm cultivars, `ghanami’, `samsmavi’ and `gheibani’ using various doses of boric acid (0...

Journal: Journal of Nuts 2011
Ali Imani Farid Asgari Mohammad Hadi Kargar Saead Piri Pireivatlou Seiyed Hassan Masomi

Pollen viability and its germination capability for fruit set in are almond and peach essential. To optimize the pollen culture medium of almond and peach and selection of best medium, the present study was carried out with 48 different culture media containing different compositions including diverse levels of boric acid (0 and 100mg/1), calcium nitrate (0,150and300mg/l،), magnesium sulphate (...

2009
M. A. Shaheen

Viability of fresh and stored pollen of date palm (Phoenix dactyllf.,.., L) was studied. Pollen samples were stored at room temperat. ture (25-30°C), under refrigeration (3-4°C)t..ln vivo test, pollen viability was determined'by percent fruit set. Results suggest that different storage conditions had no apparent effect on pollen viability as tested with acetoearmine. However, results of in vivo...

Journal: :journal of nuts 0
m. bigdeli moheb department of horticulture science, university of hormozgan, hormozgan, iran a. imani temperate fruit research center of horticultural sciences research institute (hsri), َagricultural, research, edu-cation and extension organization, tehran, iran m. shamili department of horticulture science, university of hormozgan, hormozgan, iran

this study was carried out in order to determine the effects of boron and cold stress on pollen germination of almond hybrids in vitro culture, two different media including the absence and presence of boron (0 mg/l, and 100 mg/l) in 10% sucrose and 1% agar medium at 24°c in dark conditions. the results showed that different treatments had a significant effect on the germination percentage. the...

Journal: :American journal of botany 2002
John K Kelly Aaron Rasch Susan Kalisz

The mean diameter of viable pollen grains is approximately 13 μm greater than the mean diameter of inviable grains in Mimulus guttatus. We show that this difference is large enough to be detected by particle counters and that these machines can be used to obtain a rapid estimate of pollen viability. While requiring a separate calibration, a size-based statistic is also strongly correlated with ...

Journal: :Anais da Academia Brasileira de Ciencias 2017
Everton H Souza Fernanda V D Souza Mônica L Rossi Renan M Packer Maria Amelia V Cruz-Barros Adriana P Martinelli

Pollen morphology characterization is important in taxonomy, conservation and plant breeding, and pollen viability studies can support breeding programs. This study investigated pollen morphology and male fertility in 18 species of Bromeliaceae with ornamental potential. For morphological characterization, pollen grains were acetolyzed and characterization of exine was done using scanning and t...

2014
Melekber Sulusoglu Aysun Cavusoglu

Pollen quality is important for growers and breeders. This study was carried out to determine in vitro pollen viability and pollen germination in seven genotypes of cherry laurel (Prunus laurocerasus L.). Two pollen viability tests, TTC (2,3,5-triphenyl tetrazolium chloride) and IKI (iodine potassium iodide), were used. Pollen traits of genotypes were studied using an in vitro medium containing...

Journal: :Cropp Breeding and Applied Biotechnology 2009

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