TY - JOUR
T1 - Amylopectin chain length dynamics and activity signatures of key carbon metabolic enzymes highlight early maturation as culprit for yield reduction of barley endosperm starch after heat stress
AU - Cuesta-Seijo, Jose Antonio
AU - De Porcellinis, Alice Jara
AU - Valente, Angela Hørdum
AU - Striebeck, Alexander
AU - Voss, Cynthia
AU - Marri, Lucia
AU - Hansson, Andreas
AU - Jansson, Anita M
AU - Dinesen, Malene Hessellund
AU - Fangel, Jonatan Ulrik
AU - Harholt, Jesper
AU - Popovic, Milan
AU - Thieme, Mercedes
AU - Hochmuth, Anton
AU - Zeeman, Samuel C
AU - Mikkelsen, Teis Nørgaard
AU - Jørgensen, Rikke Bagger
AU - Roitsch, Thomas Georg
AU - Møller, Birger Lindberg
AU - Braumann, Ilka
N1 - © The Author(s) 2019. Published by Oxford University Press on behalf of Japanese Society of Plant Physiologists.
PY - 2019/12/1
Y1 - 2019/12/1
N2 - Abiotic environmental stresses have a negative impact on the yield and quality of crops. Understanding these stresses is an essential enabler for mitigating breeding strategies and it becomes more important as the frequency of extreme weather conditions increases due to climate change. This study analyses the response of barley (Hordeum vulgare L.) to a heat wave during grain filling in three distinct stages: the heat wave itself, the return to a normal temperature regime, and the process of maturation and desiccation. The properties and structure of the starch produced were followed throughout the maturational stages. Furthermore, the key enzymes involved in the carbohydrate supply to the grain were monitored. We observed differences in starch structure with well-separated effects because of heat stress and during senescence. Heat stress produced marked effects on sucrolytic enzymes in source and sink tissues. Early cessation of plant development as an indirect consequence of the heat wave was identified as the major contributor to final yield loss from the stress, highlighting the importance for functional stay-green traits for the development of heat-resistant cereals.
AB - Abiotic environmental stresses have a negative impact on the yield and quality of crops. Understanding these stresses is an essential enabler for mitigating breeding strategies and it becomes more important as the frequency of extreme weather conditions increases due to climate change. This study analyses the response of barley (Hordeum vulgare L.) to a heat wave during grain filling in three distinct stages: the heat wave itself, the return to a normal temperature regime, and the process of maturation and desiccation. The properties and structure of the starch produced were followed throughout the maturational stages. Furthermore, the key enzymes involved in the carbohydrate supply to the grain were monitored. We observed differences in starch structure with well-separated effects because of heat stress and during senescence. Heat stress produced marked effects on sucrolytic enzymes in source and sink tissues. Early cessation of plant development as an indirect consequence of the heat wave was identified as the major contributor to final yield loss from the stress, highlighting the importance for functional stay-green traits for the development of heat-resistant cereals.
U2 - 10.1093/pcp/pcz155
DO - 10.1093/pcp/pcz155
M3 - Journal article
C2 - 31397873
SN - 0032-0781
JO - Plant and Cell Physiology
JF - Plant and Cell Physiology
ER -