벼 등숙기 고온이 잎의 엽록소구성과 광합성 및 생리적 변화에 미치는 영향

• 영문명: Effect of High Temperature on Leaf Physiological Changes as Chlorophyll composition and Photosynthesis Rate of Rice
• 발행기관: 한국작물학회
• 저자명: 손지영(Jiyoung Shon) 김준환(Junhwan Kim) 이충근(Chung-Kuen Lee) 양운호(Woonho Yang)
• 간행물 정보: 『한국작물학회지』제60권 제3호, 266~272쪽, 전체 7쪽
• 주제분류: 농수해양 > 기타농수해양
• 파일형태: PDF
• 발행일자: 2015.09.30

영문 초록

High temperature impairs rice grain yield and quality. To understand the effect of high temperature on leaf physiological activity and grain filling, two cultivars of rice that Dongan and Ilpum were exposed to high temperature during ripening stage. Grain filling rate, perfect grain ratio and grain weight of high temperature (27℃±4℃) treated both rice cultivars were decreased than those of control temperature (22℃±4℃) treated. The reduction rates of grain filling ratio, perfect grain ratio and grain weight of high temperature treated to control treated rice were higher in Ilpum than Dongan. Chlorophyll contents of rice leaves under high temperature at early ripening stage were higher than those of control temperature, but those were slowly decreased with no difference between temperature treatment since at mid ripening stage. Although chlorophyll a/b ratio under high temperature was decreased from heading to 15 days after heading, that was gradually increased since 15 days after heading. Protein concentrations of rice leaves for ripening stage was a similar pattern with chlorophyll changes. The rate of photosynthesis at 14 days after heading under high temperature was higher than those of control temperature, but there was no difference at those of 7 and 34 days after heading between two temperature treatment. Free sugars under high temperature treated leaves were lower than control temperature. Consequently, these results exhibit that high temperature accelerate leaf physiological activity as chlorophyll synthesis and photosynthesis rate unlike the deterioration of grain filling.

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키워드

rice high-temperature chlorophyll chlorophyll a/b ratio photosynthesis senescence