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2011 | 33 | 3 |

Tytuł artykułu

Morphological and physiological responses of root tip cells to Fe2 plus toxicity in rice

Warianty tytułu

Języki publikacji

EN

Abstrakty

EN
Two genotypes of rice (Oryza sativa L.), Azucena (iron tolerant) and IR64 (iron sensitive), were used to investigate the numbers and survival rates of root border cells (namely, in situ border cells) in plants that were exposed to excess iron (Fe²⁺). Additionally, we examined the changes in the root tip cell morphology and activities of protective enzymes in response to Fe²⁺ toxicity. The results showed that Fe²⁺ toxicity hindered the development of root border cells (RBCs) and that higher Fe²⁺ concentrations caused root cap cell walls to thicken. In the iron-sensitive rice variety, these changes lowered RBC survival rate and lead to programmed cell death. Low concentrations of Fe²⁺ were shown to facilitate the development of RBCs in the iron-tolerant rice variety and that the activities of the protective enzymes superoxide dismutase (SOD), peroxidase (POD), and catalase (CAT) were elevated in the iron-tolerant variety, thus suggesting that rice root tips could defend against Fe²⁺ toxicity by producing RBCs, root cap cells, and protective enzymes.

Słowa kluczowe

Wydawca

-

Rocznik

Tom

33

Numer

3

Opis fizyczny

p.683-689,fig.,ref.

Twórcy

autor
  • Key Laboratory of Botany, Zhejiang Normal University, Yingbin Road No. 688, Jinhua 321004, Zhengjiang, People's Republic of China
  • Quzhou College, Jinhua Road No. 78, Quzhou 324000, Zhejiang, People's Republic of China
autor
  • Key Laboratory of Botany, Zhejiang Normal University, Yingbin Road No. 688, Jinhua 321004, Zhengjiang, People's Republic of China
autor
  • Key Laboratory of Botany, Zhejiang Normal University, Yingbin Road No. 688, Jinhua 321004, Zhengjiang, People's Republic of China
autor
  • Key Laboratory of Botany, Zhejiang Normal University, Yingbin Road No. 688, Jinhua 321004, Zhengjiang, People's Republic of China
autor
  • Key Laboratory of Botany, Zhejiang Normal University, Yingbin Road No. 688, Jinhua 321004, Zhengjiang, People's Republic of China
autor
  • Key Laboratory of Botany, Zhejiang Normal University, Yingbin Road No. 688, Jinhua 321004, Zhengjiang, People's Republic of China

Bibliografia

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Typ dokumentu

Bibliografia

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