نتایج جستجو برای: pollen germination was often reduced

تعداد نتایج: 4441362  

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...

2012
Yu-Hua Wang Xiao-Cheng Li Qiang Zhu-Ge Xin Jiang Wei-Dong Wang Wan-Ping Fang Xuan Chen Xing-Hui Li

Nitric oxide (NO) plays essential roles in many biotic and abiotic stresses in plant development procedures, including pollen tube growth. Here, effects of NO on cold stress inhibited pollen germination and tube growth in Camellia sinensis were investigated in vitro. The NO production, NO synthase (NOS)-like activity, cGMP content and proline (Pro) accumulation upon treatment with NO scavenger ...

2016
Xin-Qi Gao Chang Zhen Liu Dan Dan Li Ting Ting Zhao Fei Li Xiao Na Jia Xin-Ying Zhao Xian Sheng Zhang

Pollen-stigma interactions are essential for pollen germination. The highly regulated process of pollen germination includes pollen adhesion, hydration, and germination on the stigma. However, the internal signaling of pollen that regulates pollen-stigma interactions is poorly understood. KINβγ is a plant-specific subunit of the SNF1-related protein kinase 1 complex which plays important roles ...

Ahmad Khalighi Mohammad Kermanshahani Reza Fattahi Roohangiz Naderi

Low seed yield is a limiting factor for cross breeding and hybrid seed production in cyclamen. This study was performed to investigate pollen germination and its relation to cross-pollination success and fruit set in this plant. In order to achieve a high level of pollen germination, the effect of different concentrations of chemical compounds were examined on in vitro pollen germination of cyc...

Journal: :به نژادی گیاهان زراعی و باغی 0
علی رضا قنبری استادیار گروه علوم باغبانی، دانشکدۀ کشاورزی، دانشگاه محقق اردبیلی، اردبیل، ایران علی رضا طلایی استاد گروه علوم باغبانی،دانشکدۀ علوم و مهندسی کشاورزی، پردیس کشاورزی و منابع طبیعی، دانشگاه تهران،کرج، ایران جووانی می استاد گروه علوم باغبانی، دانشکدۀ کشاورزی، دانشگاه تورینو، تورینو، ایتالیا

incompatibility in hazelnut (c. avellana l.) is the sporophytic type and under the control of a single s-locus with multiple alleles. compatibility of pollen-stigma in hazelnut is an important consideration in planning crosses in breeding program and in choosing pollinizers for orchard planting. in this study, fluorescence microscopy was used to determination of s-alleles and compatibility rela...

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 (...

2011
B. Chakrabarti S. D. Singh S. Nagarajan P. K. Aggarwal

Low temperature during reproductive stage of spring wheat causes sterility of pollen grains and reduced yield. Field experiment was conducted during the winter season in the farm of Indian Agricultural Research Institute with wheat crop to study the effect of temperature on phenology and pollen sterility of spring wheat crop. Lower mean temperature during the crop growth period led to enhanced ...

2016
Yuyan An Jie Li Chunhui Duan Longbo Liu Yongping Sun Rongxiang Cao Liangju Wang

Chemical fruit thinning has become a popular practice in modern fruit orchards for achieving high quality fruits, reducing costs of hand thinning and promoting return bloom. However, most of the suggested chemical thinners are often concerned for their detrimental effects and environmental problems. 5-Aminolevulic acid (ALA) is a natural, nontoxic, biodegradable, and environment-friendly plant ...

Journal: :Plant physiology 2008
Dong Zhang Diego Wengier Bin Shuai Cai-Ping Gui Jorge Muschietti Sheila McCormick Wei-Hua Tang

In flowering plants, the process of pollen germination and tube growth is required for successful fertilization. A pollen receptor kinase from tomato (Solanum lycopersicum), LePRK2, has been implicated in signaling during pollen germination and tube growth as well as in mediating pollen (tube)-pistil communication. Here we show that reduced expression of LePRK2 affects four aspects of pollen ge...

2010
S. M. H. Mortazavi K. Arzani A. Moieni

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...

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