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2012 | 34 | 2 |
Tytuł artykułu

Effects of NaCl or Na2SO4 salinity on plant growth, ion content and photosynthetic activity in Ocimum basilicum L.

Warianty tytułu
Języki publikacji
EN
Abstrakty
EN
Basil (Ocimum basilicum L., cultivar Genovese) plants were grown in Hoagland solution with or without 50 mM NaCl or 25 mM Na₂SO₄. After 15 days of treatment, Na₂SO₄ slowed growth of plants as indicated by root, stem and leaf dry weight, root length, shoot height and leaf area, and the effects were major of those induced by NaCl. Photosynthetic response was decreased more by chloride salinity than by sulphate. No effects in both treatments on leaf chlorophyll content, maximal efficiency of PSII photochemistry (Fv/Fm) and electron transport rate (ETR) were recorded. Therefore, an excess of energy following the limitation to CO₂ photoassimilation and a down regulation of PSII photochemistry was monitored under NaCl, which displays mechanisms that play a role in avoiding PSII photodamage able to dissipate this excess energy. Ionic composition (Na⁺, K⁺, Ca²⁺, and Mg²⁺) was affected to the same extent under both types of salinity, thus together with an increase in leaves Cl-, and roots SO₄²⁻ in NaCl and Na₂SO₄-treated plants, respectively, may have resulted in the observed growth retardation (for Na₂SO₄ treatment) and photosynthesis activity inhibition (for NaCl treatment), suggesting that those effects seem to have been due to the anionic component of the salts.
Słowa kluczowe
EN
Wydawca
-
Rocznik
Tom
34
Numer
2
Opis fizyczny
p.607-615,fig.,ref.
Twórcy
autor
  • Physiologie et Biochimie de la Tolerance au Sel des Plantes, Faculte des Sciences de Tunis, Campus Universitaire, 2092 Tunis, Tunisia
  • Dipartimento di Biologia delle Piante Agrarie, Universita di Pisa, Via del Borghetto 80, 56124 Pisa, Italy
autor
  • Physiologie et Biochimie de la Tolerance au Sel des Plantes, Faculte des Sciences de Tunis, Campus Universitaire, 2092 Tunis, Tunisia
autor
  • Dipartimento di Biologia delle Piante Agrarie, Universita di Pisa, Via del Borghetto 80, 56124 Pisa, Italy
autor
  • Physiologie et Biochimie de la Tolerance au Sel des Plantes, Faculte des Sciences de Tunis, Campus Universitaire, 2092 Tunis, Tunisia
  • Dipartimento di Biologia delle Piante Agrarie, Universita di Pisa, Via del Borghetto 80, 56124 Pisa, Italy
autor
  • Physiologie et Biochimie de la Tolerance au Sel des Plantes, Faculte des Sciences de Tunis, Campus Universitaire, 2092 Tunis, Tunisia
Bibliografia
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