Quantitative regulation of gene activity in plants.

نویسندگان

  • J Timmis
  • J Ingle
چکیده

The regulation of activity of ribosomal RNA genes has been studied in euploid and aneuploid varieties of hyacinth. The gene/gene product relationship was determined by measuring the specific gene product (stable rRNA) and the total gene product (protein) in varieties with different dosages of rRNA genes. The results show that the cellular rRNA content is positively regulated, that maximum gene utilization is not normally employed, and that the degree of utilization responds to the total genome rather than to the specific rRNA gene dosage. The mechanism of control of this regulation appears to be at the transcriptional level.

برای دانلود رایگان 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

Gene expression and activity of phenyl alanine amonialyase and essential oil composition of Ocimum basilicum L. at different growth stages

Phenylalanine amonia-lyase (PAL) is one of the most important enzymes that plays a key role in regulationof phenylpropanoid production in plants. It catalyzes the first step of the phenylpropanoid pathway in whichL-phenylalanine is deaminated to trans-cinnamic acid. This step is significant for metabolic engineering andhyper-expression of the major phenylpropanoid, methyl chav...

متن کامل

Influence of Methyl Jasmonate on Menthol Production and Gene Expression in Peppermint (Mentha x piperita L.)

Peppermint has considerable commercial value and widely cultivated for essential oil production, especially menthol. The aim of this study was to determine the quantitative expression of pulegone reductase (pr), menthofuran synthase (mfs) and limonene synthase (ls) genes in menthol biosynthesis pathway in Mentha x piperita , using semiquantitative RT-PCR analysis and evaluating menthol producti...

متن کامل

Up-regulation of plasma membrane H+-ATPase under salt stress may enable Aeluropus littoralis to cope with stress

Plasma membrane H+-ATPase is a major integral membrane protein with a role in various physiological processes including abiotic stress response. To study the effect of NaCl on the expression pattern of a gene encoding the plasma membrane H+-ATPase, an experiment was carried out in a completely random design with three replications. A pair of specific primers was designed based on the sequence o...

متن کامل

Expression and antimicrobial activity analysis of dermaseptin B1 recombinant peptides in tobacco transgenic plants

Recently, new molecular breeding and genetic engineering approaches have emerged to overcome the limitations of conventional breeding methods in generating disease-resistance transgenic plants. The use of antimicrobial peptides (AMPs) to produce transgenic plants resistant to a wide range of plant pathogens has achieved great success. Among huge number of AMPs, Dermaseptin B1 (DrsB1), an antimi...

متن کامل

Responses of Transgenic Tobacco (Nicotiana plambaginifolia) Over-Expressing P5CS Gene Underin vitroSalt Stress

Salinity is a major limiting factor for plant growth and development. To evaluate the impact of P5CS gene expression under in vitro salt stress condition, transgenic tobacco (Nicotiana plumbaginifolia) carrying P5CS gene and non-transgenic plants were treated with 0, 100, 150, 200 or 250 mM NaCl for 28 days. Proline content, lipid peroxidation and the activity of some antioxidant enzymes after ...

متن کامل

Rhizophagus irregularis regulates antioxidant activity and gene expression under cadmium toxicity in Medicago sativa

Cadmium (Cd) is a phytotoxic heavy metal (HM) that can induce generation of reactive oxygen species (ROS). Arbuscular mycorrhizal fungi (AMF) are considered as bio-ameliorators that help to mitigate HM-derived oxidative stress. The objective of this study was to assess AM fungus Rhizophagus irregularis on changes in enzymatic activity and transcription of antioxidants of Medicago sativa to Cd s...

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

عنوان ژورنال:
  • Plant physiology

دوره 56 2  شماره 

صفحات  -

تاریخ انتشار 1975