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The shoot apex development during the life cycle of Crocus sativus L. was characterized by light microscopy and two-dimensional gel electrophoresis. Using silver staining of polyacrylamide gels, numerous quantitative and qualitative changes in the populations of polypeptides were observed during transition from vegetative to prefloral and from prefloral to floral stages. Using 80 g protein, we were able to detect 352 polypeptidic spots. In comparison with the vegetative apex, 89 new polypeptides were identified in the prefloral meristem and 29 polypeptides were missing. In the reproductive meristem, 94 new spots were identified and 44 spots were missing. Thus, substantial quantitative and qualitative changes in the populations of polypeptides occurred during the prefloral stage, a point of no return in plant development, i.e., and before floral primordia initiation. 相似文献
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Essential‐Oil Composition of the Fruits of Six Heracleum L. Species from Iran: Chemotaxonomic Significance 下载免费PDF全文
The fruit essential oils of Heracleum persicum, H. rechingeri, H. gorganicum, H. rawianum, H. pastinacifolium, and H. anisactis from Iran were obtained by hydrodistillation and characterized by GC‐FID and GC/MS analyses. The oils of the six species were compared to determine the similarities and differences among their compositions. Overall, 36 compounds were identified in the fruit oils, accounting for 92.40–96.74% of the total oil compositions. Aliphatic esters constituted the main fraction of the oils (86.61–94.31%), with octyl acetate and hexyl butyrate as the major components. The oil compositions of species belonging to section Pubescentia (H. persicum, H. gorganicum, and H. rechingeri) were discriminated by equally high contents of both octyl acetate (13.84–20.48%) and hexyl butyrate (17.73–38.36%). On the other hand, the oils of H. rawianum, H. pastinacifolium and H. anisactis, belonging to section Wendia, showed lower hexyl butyrate contents (3.62–6.6%) and higher octyl acetate contents (48.71–75.36%) than the former. Moreover, isoelemicin was identified at low amounts (0.10–2.51%) only in the oils of the latter species. The differences in the oil composition among the six species were investigated by hierarchical cluster and principal component analyses, which indicated that the oil composition confirmed well the taxonomical classification based on the morphological and botanical data, and, thus, may provide a reliable marker to discriminate Heracleum species at the intersectional level. 相似文献
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Seyed Hamed Moazzami Farida Tayebeh Radjabian Massoud Ranjbar Seyed Alireza Salami Nosrat Rahmani Abdolbaset Ghorbani 《化学与生物多样性》2016,13(4):451-458
In this study, the seed oil content and fatty acid (FA) profile of 21 populations from 16 wild Salvia species of Iran were analyzed by GC. Patterns of chemical variations of the oils among species were identified via numerical analyses and also the taxonomic status of the infrageneric grouping was outlined in the genus. Salvia species were scored based on the contents of main FAs using principal coordinate analysis (PCO). The results showed that the total oil content in the seeds varied significantly, and ranged from 6.68 to 38.53% dry weight. α‐Linolenic (18:3ω3, 1.69 – 53.56%), linoleic (18:2ω6, 13.04 – 60.64%), oleic (18:1ω9, 6.15 – 27.06%), palmitic (16:0, 3.77 – 9.27%), and stearic (18:0, 1.78 – 3.05%) acid were identified as five major FAs in the oils. The amount of ω‐3 and ω‐6 FAs ranged between 1.90 – 53.80% and 13.46 – 60.83% of total FAs in the seed oils, respectively. The results confirmed that FA profiles were distinctive among the species and that they can be used as chemotaxonomic markers. The discrimination of Salvia species according to their botanical classification at intersectional level was supported. In general, seed oils of Salvia species were rich sources of polyunsaturated FAs, except in linoleic and α‐linolenic acid, and may be valuable for food and pharmaceutical industries. 相似文献
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Attaran Dowom Samaneh Abrishamchi Parvaneh Radjabian Tayebeh Salami Seyed Alireza 《Plant Cell, Tissue and Organ Culture》2022,148(1):107-117
Plant Cell, Tissue and Organ Culture (PCTOC) - Phenolic acids, as the predominant secondary metabolites of Salvia plants, are largely used in pharmaceutical industries. The main aim of the study... 相似文献
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Nezhadasad Behzad Radjabian Tayebeh Hajiboland Roghieh 《Journal of plant research》2023,136(1):117-137
Journal of Plant Research - Tolerance mechanisms employed by plants under environmental stresses can protect them against other co-occurring stresses. In this study, the effect of pre-exposure and... 相似文献
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