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Plants, Volume 8, Issue 8 (August 2019)
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Cover Story (view full-size image) Circadian timekeeping allows for anticipation of daily environmental changes and times internal [...] Read more. Circadian timekeeping allows for anticipation of daily environmental changes and times internal biological processes to match external events. For plants, some daily environmental changes can be predicted with certainty, such as dawn, and such events can lead to the likelihood of other challenges, such as the presence of day-active pests. The hormone jasmonic acid (JA) is important for defense against insects and other necrotrophic pathogens, and plays a role in some developmental processes. Through multiple mechanisms, including JA biosynthesis and regulation of core signaling, the circadian clock coordinates JA action to times of the day when it is most likely needed. These circadian effects on JA processes optimize the allocation of important resources and help balance the costs of defense against the growth needs of a plant. View this paper