Microtubule Patterns and Organelles during Microsporogenesis in Apomictic Chondrilla Juncea L
نویسندگان
چکیده
This study investigated patterns of cytoskeletal organization during microsporogenesis in Chondrilla juncea L., an autonomous apomict with a triploid chromosome number (2n = 15). The distribution of microtubules and organelles is not typical. The microtubules do not form a normal phragmoplast and consequently the organelle equatorial plate observed in many taxons is not present. The organelles are dispersed randomly in both the central and peripheral parts of the cytoplasm.
منابع مشابه
Antibacterial Activity of Different Extracts of Aerial Parts of Chondrilla juncea L, Ajuga comata Stapf, Nepeta ucrainica L, and Delphinium speciosum M.B
Background and purpose: Herbal drug derivatives have been commonly used in management and treatment and of some infections. This study aimed at evaluating the antibacterial effects of Chondrilla juncea L, Ajuga comata Stapf, Nepeta ucrainica L, and Delphinium speciosum M.B extracts. Materials and methods: Antibacterial activity of different extracts (n-hexane, dichloromethane, and methanol) o...
متن کاملOn the Occurrence of Caffeoyltartronic Acid and Other Phenolics in Chondrilla juncea
C affeoyltartronic acid and other eleven phenolic com pounds were identified in the M eO H extract o f Chondrilla juncea: the flavonoids luteolin, luteolin-7-glucoside, luteolin-7-galactosylglucuronide and quercetin-3-galactoside; the phenolic acids protocatechuic, caffeic, chlorogenic, isochlorogenic and isoferulic and the coum arins cichoriin and aesculetin. The taxonom ic im plications o f...
متن کاملExploiting the clonal variability of Chondrilla juncea to detect virulent strains of Puccinia chondrillina for use in Australia
The use of P. chondrillina, a rust fungus, as a biocontrol agent for skeleton weed (C. juncea) has resulted in stable control of the most prevalent clone of that weed in Australia. However, the two other clones occurring there have remained unaffected due to the extreme specificity of the imported strain of the rust. Recent large scale collections from Eurasia have emphazised the inherent diffi...
متن کاملمروری بر جنسهای Chondrilla و Heteroderis از تیره Asteraceae در ایران
واریتههای گونه Chondrilla juncea که در فلورا ایرانیکا مترادف یکدیگر قرار دارند با توجه به وجود یا عدم وجودکرکهای زبر روی رگبرگ میانی سطح خارجی برگکهای داخلی گریبان و شکل و اندازه برگهای ساقهای مجدداً به سطح واریته ارتقاء می یابند. علاوه بر این واریته longifolia var. که از شمال شرق ایران جمع آوری شده است به عنوان آرایه جدیدی برای این گونه معرفی می شود. این واریته با برگهای ساقهای مستطیل...
متن کاملThe structure and chemistry of plastid differentiation during male meiosis in Lilium henryi.
The unusual content of the plastids characteristic of male meiosis and microsporogenesis in Lilium henryi has been investigated using enzymic digestion of material prepared for electron microscopy. Apart from membranous tubules and osmiophilic droplets, commonly regarded as normal constituents of the stroma of undifferentiated plastids, these organelles contained a single conspicuous associatio...
متن کامل