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2011 | 33 | 5 |

Tytuł artykułu

Calcium regulates Gladiolus flower senescence by influencing antioxidative enzymes activity

Warianty tytułu

Języki publikacji

EN

Abstrakty

EN
The objective of the present investigation was to study the role of calcium on antioxidative enzymes activity during the post-harvest life of Gladiolus (Gladiolus grandiflorus). Among the various calcium (Ca) treatments, 50 mmol 1⁻¹ Ca treatments caused the highest increase in the vase life of the spike, from 5.5 days in control to about 9 days. Relative water content and membrane stability index (MSI) decreased from I to V stage. However, significant increase in relative water content and MSI were observed by 50 mmol 1⁻¹ Ca as compared to control. Indices of oxidative stress such as lipid peroxidation and lipoxygenase activity increased from I to V stage, but decreased significantly in 50 mmol 1⁻¹ Ca treatment. The activities of antioxidant enzymes superoxide dismutase (SOD) and catalase (CAT) decreased initially from stage I to II, followed by an increase in stage III and thereafter started to decline at stages IV and V. Ascorbate peroxidase (APX) activity increased initially from stage I to III and thereafter declined in stage IV and V in both control and treatment. However, Ca with concentration of 50 mmol 1⁻¹ increased the activities of SOD, CAT and APX at all the stages. The results revealed that spikes treated with Ca (50 mmol 1⁻¹) solution maintained higher level of antioxidant enzymes activity and also showed delayed senescence in comparison to control.

Słowa kluczowe

Wydawca

-

Rocznik

Tom

33

Numer

5

Opis fizyczny

p.1897-1904,fig.,ref.

Twórcy

autor
  • Division of Plant Physiology, Indian Agricultural Research Institute, New Delhi, 110 012, India
autor
  • Division of Plant Physiology, Indian Agricultural Research Institute, New Delhi, 110 012, India
autor
  • Division of Plant Physiology, Indian Agricultural Research Institute, New Delhi, 110 012, India

Bibliografia

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