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2020 Vol.65, Issue 4 Preview Page
Changes in Growth Characteristics of Waxy Corn ‘Ilmichal’ due to Low Temperature during the Seedling Stage

일미찰옥수수의 유묘기 저온에 따른 생육특성 변화

Seung Ho Jeon1
,
Seung Ka Oh2
,
Han Yong Kim3
,
Chae-In Na4
,
Hui Su Bae5
,
Young Son Cho6*
전 승호1
,
오 승가2
,
김 한용3
,
나 채인4
,
배 희수5
,
조 영손6*
1Professor, Department of Well-being Resources, College of Life Science and Natural Resources, Sunchon National University
2Ph.D Course Student, Department of Plant Resources, Gyeongnam National University of Science & Technology
3Professor, Department of Applied Plant Science, Chonnam National University
4Professor, Department of Agricultural Plant Science, Gyeongsang National University
5Reseacher, Division of Crop Foundation, National Institute of Crop Science, Rural Development Administration
6Professor, Department of Agronomy, Gyeongnam National University of Science & Technology
1순천대학교 생명산업과학대학 웰빙자원학과 교수
2경남과학기술대학교 식물자원학과 박사과정
3전남대학교 응용식물학과 교수
4경상대학교 농업식물과학과 교수
5농촌진흥청 국립식량과학원 농업연구사
6경남과학기술대학교 농학·한약자원학부 교수
*Corresponding Author
1 December 2020. pp. 426-435
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Abstract

To determine the damages to waxy corn caused by low temperature weather, we investigated the relationship between the temperature and duration of low temperature treatment and the changes in growth characteristics during the recovery period after the treatments in different growth periods. Growth inhibition started in the low temperature group treated at temperatures below 5°C for three days. The inhibition ratio (IR) was more than 22% or more in all sample groups. As the treatment duration increased and the Temperature decreased, the growth was more greatly inhibited than that in the control. The IR was the highest at 27% or more in the 2nd leaf stage group treated at below 5°C for 5 days. The IR was in the order of 2nd leaf stage > 1st leaf stage > coleoptile. The IR during recovery was the highest in the 2nd leaf stage group treated at -3°C degree for 7 days, nd the values were 82% and 98% for NDVI and Fv/Fm, respectively. Especially, all groups treated at -3°C showed either no changes or decreases in the growth characteristics. As a result, growth inhibition increased as the temperature decreased, and as the duration of the low temperature increased. The degree of damage was in the order of 2nd leaf stage > 1st leaf stage > coleoptile. All early seedlings stopped growing and withered when exposed to temperatures at or below -3°C for 3 days or more.

Keywords
chilling injury
inhibition ratio
seedling stage
waxy corn
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Information
  • Publisher :The Korean Society of Crop Science
  • Publisher(Ko) :한국작물학회
  • Journal Title :The Korean Journal of Crop Science
  • Journal Title(Ko) :한국작물학회지
  • Volume : 65
  • No :4
  • Pages :426-435
  • Received Date : 2020-08-25
  • Revised Date : 2020-09-16
  • Accepted Date : 2020-09-21
  • DOI :https://doi.org/10.7740/kjcs.2020.65.4.426
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