TY - JOUR
T1 - Temporal effects on jasmonate induction of anti-herbivore defense in Physalis angulata
T2 - Seasonal and ontogenetic gradients
AU - Doan, Anh Thu
AU - Ervin, Gary
AU - Felton, Gary
N1 - Funding Information:
We appreciate the assistance of H. Eichenseer in providing seeds of Physalis angulata. A most helpful critique by T. Mutchler and comments by anonymous reviewers improved greatly upon earlier versions of this manuscript. Research reported herein was supported in part by a grant from the National Science Foundation (NSF-981693).
PY - 2004/2
Y1 - 2004/2
N2 - Patterns of defensive enzyme (polyphenol oxidase (PPO)) induction were examined in Physalis angulata L. (cutleaf ground cherry) across seasonal and ontogenetic time gradients, in response to foliar jasmonic acid (JA) application. These studies showed strongest JA induction of PPO activity in young plants and during the month of July (mid-summer). In older plants, JA treatment was correlated with a decrease in PPO activity, and no significant effects of JA treatment were observed beyond September. Developmental patterns of induction corresponded with published studies of defense induction in other species, indicating active defense of young tissues and potential shifts in defensive strategy as plants transition from growth to reproduction. Peak induction during summer corresponds with periods of high solar irradiance and herbivorous insect populations, both of which are stresses against which PPO has been demonstrated effective.
AB - Patterns of defensive enzyme (polyphenol oxidase (PPO)) induction were examined in Physalis angulata L. (cutleaf ground cherry) across seasonal and ontogenetic time gradients, in response to foliar jasmonic acid (JA) application. These studies showed strongest JA induction of PPO activity in young plants and during the month of July (mid-summer). In older plants, JA treatment was correlated with a decrease in PPO activity, and no significant effects of JA treatment were observed beyond September. Developmental patterns of induction corresponded with published studies of defense induction in other species, indicating active defense of young tissues and potential shifts in defensive strategy as plants transition from growth to reproduction. Peak induction during summer corresponds with periods of high solar irradiance and herbivorous insect populations, both of which are stresses against which PPO has been demonstrated effective.
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U2 - 10.1016/S0305-1978(03)00142-X
DO - 10.1016/S0305-1978(03)00142-X
M3 - Article
AN - SCOPUS:0742270933
SN - 0305-1978
VL - 32
SP - 117
EP - 126
JO - Biochemical Systematics and Ecology
JF - Biochemical Systematics and Ecology
IS - 2
ER -