Bosnian
Albanian
Arabic
Armenian
Azerbaijani
Belarusian
Bengali
Bosnian
Catalan
Czech
Danish
Deutsch
Dutch
English
Estonian
Finnish
Français
Greek
Haitian Creole
Hebrew
Hindi
Hungarian
Icelandic
Indonesian
Irish
Italian
Japanese
Korean
Latvian
Lithuanian
Macedonian
Mongolian
Norwegian
Persian
Polish
Portuguese
Romanian
Russian
Serbian
Slovak
Slovenian
Spanish
Swahili
Swedish
Turkish
Ukrainian
Vietnamese
Български
中文(简体)
中文(繁體)
Biochemical and Biophysical Research Communications 1998-Nov

Proline suppresses Rubisco activity in higher plants.

Samo registrirani korisnici mogu prevoditi članke
Prijavite se / prijavite se
Veza se sprema u međuspremnik
P Sivakumar
P Sharmila
P P Saradhi

Ključne riječi

Sažetak

Seedlings of Brassica juncea, Sesbania sesban, and Oryza sativa exposed to salt stress accumulated proline to levels as high as 4- to 20-fold over those of controls. Because chloroplasts are the major site for synthesis of stress induced proline accumulation, in vitro studies were conducted to see how the over-accumulation of this solute influences the activity of the major chloroplastic enzyme Ribulose 1,5-bis-phosphate carboxylase (Rubisco) purified from the above plant species. Surprisingly, proline (believed to be a compatible solute) suppressed the activity of Rubisco significantly even when present at a concentration as low as 100 mM. The extent of this inhibition in Rubisco activity increased with an increase in the concentration of proline. Irrespective of the plant species from which Rubisco was purified, its activity declined by about 50% in the presence of 1 M proline. Rubisco from all three plant species was sensitive to NaCl and proline accelerated salt induced suppression in its activity. To the best of our knowledge this is the first report wherein a negative effect of proline (which is believed to protect enzymes under stress) has been clearly demonstrated. This perturbing effect of proline on Rubisco from higher plant species belonging to three distinct families cautions targeting of gene(s)/gene products for over-production of proline into chloroplasts.

Pridružite se našoj
facebook stranici

Najkompletnija baza ljekovitog bilja potpomognuta naukom

  • Radi na 55 jezika
  • Biljni lijekovi potpomognuti naukom
  • Prepoznavanje biljaka po slici
  • Interaktivna GPS karta - označite bilje na lokaciji (uskoro)
  • Pročitajte naučne publikacije povezane sa vašom pretragom
  • Pretražite ljekovito bilje po učincima
  • Organizirajte svoja interesovanja i budite u toku sa istraživanjem vijesti, kliničkim ispitivanjima i patentima

Upišite simptom ili bolest i pročitajte o biljkama koje bi mogle pomoći, unesite travu i pogledajte bolesti i simptome protiv kojih se koristi.
* Sve informacije temelje se na objavljenim naučnim istraživanjima

Google Play badgeApp Store badge