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2021 Vol.66, Issue 4 Preview Page

Original Research Article

Effects of Elevated Temperature after the Booting Stage on Physiological Characteristics and Grain Development in Wheat

밀에서 출수 후 잎의 생리적 특성 및 종실 생장에 대한 수잉기 이후 고온의 효과

Ki Eun Song1
,
Jae Eun Choi2
,
Jae Gyeong Jung2
,
Jong Han Ko3
,
Kyung Do Lee4
,
Sang-In Shim56*
송 기은1
,
최 재은2
,
정 재경2
,
고 종한3
,
이 경도4
,
심 상인56*
1PhD Student, Department of Applied Biological Science, Applied Biology (BK Plus), Gyeongsang National University, Jinju 52828, Korea
2MSc Student, Department of Agronomy, Gyeongsang National University, Jinju 52828, Korea
3Professor, Applied Plant Science, Chonnam National University, Gwangju 61186, Korea
4Agriculture Researcher, Department of Agricultural Enviroment, National Institute of Agricultural Sciences, Wanju 55365, Korea
5Senior Researcher, Institute of Life Sciences, Gyeongsang National University, Jinju 52828, Korea
6Professor, Department of Agronomy, Gyeongsang National University, Jinju 52828, Korea
1경상국립대학교 응용생명과학부 BK21+ 프로그램 박사과정
2경상국립대학교 농학과 석사과정
3전남대학교 응용식물학과 교수
4농촌진흥청 국립농업과학원 농업환경부 연구사
5경상국립대학교 생명과학연구원 책임연구원
6경상국립대학교 농학과 교수
*Corresponding Author
1 December 2021. pp. 307-317
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Abstract

In recent years, global warming has led to frequent climate change-related problems, and elevated temperatures, among adverse climatic factors, represent a critical problem negatively affecting crop growth and yield. In this context, the present study examined the physiological traits of wheat plants grown under high temperatures. Specifically, the effects of elevated temperatures on seed development after heading were evaluated, and the vegetation indices of different organs were assessed using hyperspectral analysis. Among physiological traits, leaf greenness and OJIP parameters were higher in the high-temperature treatment than in the control treatment. Similarly, the leaf photosynthetic rate during seed development was higher in the high-temperature treatment than in the control treatment. Moreover, temperature by organ was higher in the high-temperature treatment than in the control treatment; consequently, the leaf transpiration rate and stomatal conductance were higher in the control treatment than in the high-temperature treatment. On all measuring dates, the weight of spikes and seeds corresponding to the sink organs was greater in the high-temperature treatment than in the control treatment. Additionally, the seed growth rate was higher in the high-temperature treatment than in the control treatment 14 days after heading, which may be attributed to the higher redistribution of photosynthates at the early stage of seed development in the former. In hyperspectral analysis, the vegetation indices related to leaf chlorophyll content and nitrogen state were higher in the high-temperature treatment than in the control treatment after heading. Our results suggest that elevated temperatures after the booting stage positively affect wheat growth and yield.

Keywords
high temperature
hyperspectral analysis
NDVI
seed development
wheat
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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 : 66
  • No :4
  • Pages :307-317
  • Received Date : 2021-09-14
  • Revised Date : 2021-09-30
  • Accepted Date : 2021-10-01
  • DOI :https://doi.org/10.7740/kjcs.2021.66.4.307
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