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2004•Gansu Nongye Daxue xuebaoRequires access

Effects of SA on physiological indexes of chilling-tolerance in watermelon seedlings

Jihua Yu

Open publisher page 2 citations

Abstract

The seedlings of watermelon (Citrullus lanatus Mansf. cv. Jinxin 1) at 3 leaf stage were treated with 1.0, 2.0, 3.0 and 3.5 mmol/L of SA for three days and then exposed to 5℃ low temperature for 24 h in order to study the effects of SA on chilling-tolerance activity. The chilling-tolerance of seedling of watermelon could be increased with SA treatment. The concentration of SA at 1.0mmol/L showed the most effective result. Compared with the control the activities of three protective enzymes, such as peroxidase (POD), catalase (CAT) and adenosine triphosphatase (ATPase) increased, while the malondialdehyde (MDA) content decreased in the leave of treated plants. The decline of chlorophyll content of those leaves pretreated by SA under chilling temperature were reduced.

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What this paper is about

The seedlings of watermelon (Citrullus lanatus Mansf. cv. Jinxin 1) at 3 leaf stage were treated with 1.0, 2.0, 3.0 and 3.5 mmol/L of SA for three days and then exposed to 5℃ low temperature for 24 h in order to study the effects of SA on chilling-tolerance activity. The chilling-tolerance of seedling of watermelon could be increased with SA treatment. The concentration of SA at 1.0mmol/L showed the most effective result. Compared with the control the activities of three protective enzymes, such as peroxidase (POD), catalase (CAT) and adenosine triphosphatase (ATPase) increased, while the malondialdehyde (MDA) content decreased in the leave of treated plants. The decline of chlorophyll content of those leaves pretreated by SA under chilling temperature were reduced.

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Available abstract

The seedlings of watermelon (Citrullus lanatus Mansf. cv. Jinxin 1) at 3 leaf stage were treated with 1.0, 2.0, 3.0 and 3.5 mmol/L of SA for three days and then exposed to 5℃ low temperature for 24 h in order to study the effects of SA on chilling-tolerance activity. The chilling-tolerance of seedling of watermelon could be increased with SA treatment. The concentration of SA at 1.0mmol/L showed the most effective result. Compared with the control the activities of three protective enzymes, such as peroxidase (POD), catalase (CAT) and adenosine triphosphatase (ATPase) increased, while the malondialdehyde (MDA) content decreased in the leave of treated plants. The decline of chlorophyll content of those leaves pretreated by SA under chilling temperature were reduced.

Key concepts: Citrullus lanatus, Malondialdehyde, Catalase, Seedling, Point of delivery, Horticulture, Peroxidase, Biology

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