نتایج جستجو برای: subsect ochroleuca
تعداد نتایج: 198 فیلتر نتایج به سال:
• Effective extraction of fucoxanthin, ?-carotene and chlorophyll-a from brown algae. Development a simple HPLC method for detecting algae pigments. Rapid identification quantification pigments by HPLC-DAD. Assessment the best techniques to obtain highest yield. Efficient pigment with UAE nine species. Seaweeds are photosynthetic organisms that have high contents The coloration each alga is def...
We investigated genetic variation and evolutionary history of closely related taxa of Picris subsect. Hieracioides with major focus on the widely distributed P. hieracioides and its closely related congeners, P. hispidissima, P. japonica, P. olympica, and P. nuristanica. Accessions from 140 sample sites of the investigated Picris taxa were analyzed on the infra- and the inter-specific level usi...
The Mediterranean deep-water kelp Laminaria rodriguezii is an endangered species in the Adriatic Sea
Deep-water kelps are little-known large brown algae occurring close to the lower limit of photosynthetic life in the sea. This study compares historical and recent records of the deep-water Mediterranean kelp Laminaria rodriguezii in the Adriatic Sea. Historical records include data from herbarium collections and trawling fishery expeditions in the mid-twentieth century, while recent data compr...
Kelps dominate rocky shores in temperate latitudes, acting as important foundation species. Recently, kelp forests have received growing attention for their decline around the world. Climate change is one of main drivers deforestation, both through abiotic stress and/or distortion biotic interactions. In NW Spain, golden ( Laminaria ochroleuca ) recently declined some areas due to excessive gra...
This paper is the last of a series of papers devoted to the bispectral problem [3]–[6]. Here we examine the connection between the bispectral operators constructed in [6] and the Lie algebra W1+∞ (and its subalgebras). To give a more detailed idea of the contents of the present paper we briefly recall the results of [4]–[6] which we need. In [4] we built large families of representations of W1+...
Sequestration of chemical defenses from host plants is a strategy widely used by herbivorous insects to avoid predation. Larvae of the arctiine moth Utetheisa ornatrix feeding on unripe seeds and leaves of many species of Crotalaria (Leguminosae) sequester N-oxides of pyrrolizidine alkaloids (PAs) from these host plants, and transfer them to adults through the pupal stage. PAs confer protection...
Stachydrine (I), the methyl betaine of proline, occurs in a number of plants (1). Its biogenesis has been the subject of an investigation by Klein and Linser (2) who found an increase in stachydrine content of the planbs after an injection of proline into the hollow stems of Guleopsis ochroleuca and Stachys palustris. They suggest two schemes for the biogenesis of proline, one from ornithine, t...
گونه h. piranshahricum به عنوان گونه جدید از ایران معرفی می گردد. این گونه متعلق به بخش sect. pratensina و زیر بخش subsect. pratenses است و با گونه h. longiscapum قرابت زیادی دارد. در گونه h. longiscapum ساقه با کرک های ستاره ای و غده ای، دمگل آذین و برگه های گریبان با کرک های غده ای، تعداد برگ های قاعده ای 2-4 و مستطیلی، برگهای ساقه ای 1 (-2)، تعداد کپه های گل آذین 2-10، برگهای ناحیه گل آذین...
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