PL EN


Preferencje help
Widoczny [Schowaj] Abstrakt
Liczba wyników
2016 | 30 | 4 |

Tytuł artykułu

Heat shock increases oxidative stress to modulate growth and physico-chemical attributes in diverse maize cultivars

Treść / Zawartość

Warianty tytułu

Języki publikacji

EN

Abstrakty

EN
The present investigation was conducted to appraise the physiochemical adjustments in contrasting maize cultivars, namely, PakAfgoi (tolerant) and EV-5098 (sensitive) subjected to heat shock. Seven-day-old seedlings were exposed to heat shock for different time intervals (1, 3, 6, 24, 48 and 72 h) and data for various physiochemical attributes determined to appraise time course changes in maize. After 72 h of heat shock, the plants were grown under normal conditions for 5 d and data for different growth attributes and photosynthetic pigments recorded. Exposure to heat shock reduced growth and photosynthetic pigments in maize cultivars. The plants exposed to heat shock for up to 3 h recovered growth and photosynthetic pigments when stress was relieved. A time course rise in the relative membrane permeability, hydrogen peroxide (H2O2) and malondialdehyde contents was recorded particularly in the EV-5098 indicating that heat shock-induced oxidative stress. Activities of different enzymatic antioxidants greatly altered due to heat shock. For instance, an increase in superoxide dismutase activity was recorded in both maize cultivars. The activity of ascorbate peroxidase was greater in Pak-Afgoi. However, the peroxidase and catalase activities were higher in plants of EV-5098. Heat shock caused a significant rise in the proline and decline in the total free amino acids. Overall, the performance of Pak-Afgoi was better in terms of having lesser oxidative damage and greater cellular levels of proline. The results suggested that oxidative stress indicators (relative membrane permeability, H2O2 and malondialdehyde) and proline can be used as markers for heat shock tolerant plants.

Słowa kluczowe

Wydawca

-

Rocznik

Tom

30

Numer

4

Opis fizyczny

p.519-531,fig.,ref.

Twórcy

autor
  • Department of Botany, Government College University, Faisalabad-38000, Pakistan
  • Department of Environmental Life Sciences, Graduate School of Life Sciences, Tohoku University, Sendai 980-8577, Japan
autor
  • Department of Botany, Government College University, Faisalabad-38000, Pakistan
autor
  • Department of Botany, Government College University, Faisalabad-38000, Pakistan
autor
  • Department of Botany, Government College University, Faisalabad-38000, Pakistan
autor
  • Department of Applied Chemistry and Biochemistry, Government College University, Faisalabad-38000, Pakistan
autor
  • Department of Botany, Government College University, Faisalabad-38000, Pakistan

Bibliografia

Typ dokumentu

Bibliografia

Identyfikatory

Identyfikator YADDA

bwmeta1.element.agro-41ee4327-9ba4-4c0d-8264-c2becb72456c
JavaScript jest wyłączony w Twojej przeglądarce internetowej. Włącz go, a następnie odśwież stronę, aby móc w pełni z niej korzystać.