نتایج جستجو برای: brassicaceae
تعداد نتایج: 2597 فیلتر نتایج به سال:
گونه جدید aethionema sabzevaricumاز تیره شب بو از شمال شرق ایران شرح و به تصویر کشیده شده است. این گونه بومزاد با عرصه گسترش محدود، صخره زی بوده و در صخره های سرپنتینی رشته کوه جغتای خراسان در شمال شرقی ایران یافت می شود و از نظر ریخت شناسی با گروه گونه های a. saxatile نزدیکی دارد. این گونه، چند ساله با بن چوبی و برگهای متناوب گوشتی است. گلبرگهای سفید دارد که در بخش بالایی ناخنک و قاعده پ...
گونه جدید sisymbrium kermanicum به عنوان گونه جدیدی از ایران معرفی می شود. این گونه با داشتن میوه هایی به طول 60 تا 70 میلی متر که فقط در فوقانی ترین قسمت خود دارای کرک های محکم و خشنی می باشد از سایر گونه های این جنس قابل تشخیص است و به دلیل قرابتی که با گونه هایs. brassiciforme و sisymbrium irio دارد با آنها مقایسه می شود. طرح و پراکنش جغرافیایی این گونه جدید ارائه می گردد.
Self-incompatibility in Brassica entails the rejection of pollen grains that express specificities held in common with the seed parent. In Brassica, pollen specificity is encoded at the multipartite S-locus, a complex region comprising many expressed genes. A number of species within the Brassicaceae express sporophytic self-incompatibility, under which individual pollen grains bear specificiti...
This review is an attempt to analyze possible ways of bractless infl orescence formation in Cruciferae. Function of genes which are supposed to play a certain role in a process of bract reduction/development – LFY, AP1, AP2, BOP1, BOP2, JAG, FUL/AGL8, SOC1/AGL20, BRA – is discussed with concentration on the structure of fl owers and infl orescences, based on the results of genetic analysis (inc...
We used field-collected seeds of Arabidopsis thaliana (Brassicaceae) to simulate a colonization event of plants from diverse locations into a common environment to compare regionally "local" and "foreign" populations of this historically mobile species. Life history varied among regional groups, but most variation was found among populations within regions. While we found significant difference...
1. The distinction between semelparity and iteroparity is one of the most fundamental in life-history biology. Despite an abundance of theory proposed to explain the evolution of this dichotomy, few quantitative empirical tests exist. 2. We report here on life-history variation in the perennial herb Arabis fecunda (Brassicaceae), in which differences in the frequency of iteroparity and terminal...
Alternaria brassicicola causes dark spot (or black spot) disease, which is one of the most common and destructive fungal diseases of Brassicaceae spp. worldwide. Here, we report the draft genome sequence of strain Abra43. The assembly comprises 29 scaffolds, with an N50 value of 2.1 Mb. The assembled genome was 31,036,461 bp in length, with a G+C content of 50.85%.
U.S. salmonellosis outbreaks have occurred following consumption of tomato and cantaloupe but not lettuce. We report differential contamination among agricultural seedlings by Salmonella enterica via soil. Members of the family Brassicaceae had a higher incidence of outbreak than carrot, lettuce, and tomato. Once they were contaminated, phyllosphere populations were similar, except for tomato. ...
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