Effects of Low Temperature Stress on Seedlings of Rootstoch Hybrid F₁(Cucurbita maxima×Cucurbita moschata) and Their Parents(PDF)

《北方园艺》[ISSN:1001-0009/CN:23-1247/S]

Issue:

2013年02期

Page:

20-22

Research Field:

Publishing date:

Info

Title:

Effects of Low Temperature Stress on Seedlings of Rootstoch Hybrid F₁(Cucurbita maxima×Cucurbita moschata) and Their Parents

Author(s):

SUN Ji-qing¹; SUN Ling-qiang²; LI Min¹

1.College of Horticulture，Qingdao Agricultural University，Qingdao，Shandong 266109；

2.Qingdao Seed Station，Qingdao，Shandong 266100

Keywords:

Cucurbita maxima Duch; Cucubita moschata Duch; hybrid F₁; low temperature treatment; chilling tolerance

PACS:

S 642.1

DOI:

-

Abstract:

Seedlings of Cucurbita maxima Duch(memale male parent，FP)，Cucubita moschata Duch (male parent，MP) and their hybrid F₁(C.maxima×C. moschata) were handled with low-temperature treatment (5℃，2 days).Root activity，conductivity percentage，the malondialdelyole (MDA) contents，the activities of super oxygen dehydrogenises (SOD)，peroxidase (POD) and catalase (CAT) were determined.The results showed that the root activity of hybrid F₁ was the strongest，the conductance and the MDA content was the lowest.The activities of SOD，POD and CAT in root of hybrid F₁ were the highest，which was followed by C.maxima，C. moschata was the lowest.The changes of physiological index were closely related to chilling tolerance of pumpkin，that was，chilling tolerance of hybrid F₁ was the highest，next were C.maxima and C.moschata last.

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