Reproduction Mode in Hypericum and its Consequences

نویسندگان

  • Pavol Mártonfi
  • Lenka Mártonfiová
چکیده

Several modes of reproduction were described in the genus Hypericum. Besides obligate sexuality, irregularities in meiosis, polyembryony and pseudogamous apomixis were noticed in various taxa of the genus. This review summarizes previous knowledge and also analyses evolutionary consequences of different breeding systems and possible employment of particular reproductive modes for breeding in the genus Hypericum. _____________________________________________________________________________________________________________

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Evolution of cryptic gene pools in Hypericum perforatum: the influence of reproductive system and gene flow.

BACKGROUND AND AIMS Hypericum perforatum (St. John's wort) is a widespread Eurasian perennial plant species with remarkable variation in its morphology, ploidy and breeding system, which ranges from sex to apomixis. Here, hypotheses on the evolutionary origin of St. John's wort are tested and contrasted with the subsequent history of interspecific gene flow. METHODS Extensive field collection...

متن کامل

Pistil Transcriptome Analysis to Disclose Genes and Gene Products Related to Aposporous Apomixis in Hypericum perforatum L.

Unlike sexual reproduction, apomixis encompasses a number of reproductive strategies, which permit maternal genome inheritance without genetic recombination and syngamy. The key biological features of apomixis are the circumvention of meiosis (i.e., apomeiosis), the differentiation of unreduced embryo sacs and egg cells, and their autonomous development in functional embryos through parthenogen...

متن کامل

I-16: Assisted Reproduction and Multiple Gestation: What Are The Psychological Consequences

To describe the social and historical impact of ART on multiple gestations and to discuss psychological issues unique to these families. At the time of the birth of the Dionne quintuplets in 1934, only 33 cases of quintuplets had been reported in the literature and none of the quintuplets survived more than 50 days. Spontaneous higher order multiple gestation is still rare but the number of iat...

متن کامل

Inhibition of acute and chronic pain in male rats by aqueous extract of Hypericum perforatum L

Introduction: Hypericum perforatum L was coded in medicinal plants research center of Shaheed Beheshti university and using decoction method was extracted. There are many reports concerning the antidepressant effects of Hypericum perforatum L. (HP), but there are few studies indicating its antinociceptive effects of Hypericum specially Hypericum perforatum L. Materials & Methods: In this expe...

متن کامل

Preparation of antibacterial electrospun Poly lactic-co–glycolic acid nanofibers containing Hypericum Perforatum with bedsore healing property and evaluation of its drug release performance

Skin drug delivery systems with controlled release are suitable means for the local transfer of pharmaceutical compounds to the damaged and healthy layers of skin. Nanofibrous membrane prepares uniform moisture in the wound environment with less accumulation of fluid secretion due to its variable pore size. Electrospinning takes advantage of using herbal extracts in the form of electrospun nano...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

عنوان ژورنال:

دوره   شماره 

صفحات  -

تاریخ انتشار 2010