Melatonin alleviates low PS I‐limited carbon assimilation under elevated CO₂ and enhances the cold tolerance of offspring in chlorophyll b‐deficient mutant wheat

TY - JOUR

T1 - Melatonin alleviates low PS I‐limited carbon assimilation under elevated CO2 and enhances the cold tolerance of offspring in chlorophyll b‐deficient mutant wheat

AU - Li, Xiangnan

AU - Brestic, Marian

AU - Tan, Dun-xian

AU - Zivcak, Marek

AU - Zhu, Xiancan

AU - Liu, Shengqun

AU - Song, Fengbin

AU - Reiter, Russel J.

AU - Liu, Fulai

PY - 2018

Y1 - 2018

N2 - Melatonin is involved in the regulation of carbohydrate metabolism and induction of cold tolerance in plants. The objective of this study was to investigate the roles of melatonin in modulation of carbon assimilation of wild-type wheat and the Chl b-deficient mutant ANK32B in response to elevated CO2 concentration ([CO2]) and the transgenerational effects of application of exogenous melatonin (hereafter identified as melatonin priming) on the cold tolerance in offspring. The results showed that the melatonin priming enhanced the carbon assimilation in ANK32B under elevated [CO2], via boosting the activities of ATPase and sucrose synthesis and maintaining a relatively higher level of total chlorophyll concentration in leaves. In addition, melatonin priming in maternal plants at grain filling promoted the seed germination in offspring by accelerating the starch degradation and improved the cold tolerance of seedlings through activating the antioxidant enzymes and enhancing the photosynthetic electron transport efficiency. These findings suggest the important roles of melatonin in plant response to future climate change, indicating that the melatonin priming at grain filling in maternal plants could be an effective approach to improve cold tolerance of wheat offspring at seedling stage.

AB - Melatonin is involved in the regulation of carbohydrate metabolism and induction of cold tolerance in plants. The objective of this study was to investigate the roles of melatonin in modulation of carbon assimilation of wild-type wheat and the Chl b-deficient mutant ANK32B in response to elevated CO2 concentration ([CO2]) and the transgenerational effects of application of exogenous melatonin (hereafter identified as melatonin priming) on the cold tolerance in offspring. The results showed that the melatonin priming enhanced the carbon assimilation in ANK32B under elevated [CO2], via boosting the activities of ATPase and sucrose synthesis and maintaining a relatively higher level of total chlorophyll concentration in leaves. In addition, melatonin priming in maternal plants at grain filling promoted the seed germination in offspring by accelerating the starch degradation and improved the cold tolerance of seedlings through activating the antioxidant enzymes and enhancing the photosynthetic electron transport efficiency. These findings suggest the important roles of melatonin in plant response to future climate change, indicating that the melatonin priming at grain filling in maternal plants could be an effective approach to improve cold tolerance of wheat offspring at seedling stage.

U2 - 10.1111/jpi.12453

DO - 10.1111/jpi.12453

M3 - Journal article

C2 - 28833478

SN - 0742-3098

VL - 64

SP - 1

EP - 16

JO - Journal of Pineal Research

JF - Journal of Pineal Research

IS - 1

M1 - e12453

ER -