The responses and recovery after gamma irradiation are highly dependent on leaf age at the time of exposure in rice (Oryza sativa L.)

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@article{9cf00e9c96b1411e940fb26c79064b41,
title = "The responses and recovery after gamma irradiation are highly dependent on leaf age at the time of exposure in rice (Oryza sativa L.)",
abstract = "Most plant studies on the effects of ionizing radiation at the individual level mainly focus on the immediate responses and not on the responses elicited following recovery. Therefore, we investigated the effects of gamma radiation in rice seedlings exposed to four different gamma dose rates for 2 weeks, after which half of the plants were harvested immediately and the other half were allowed to recover for another 2 weeks. For plants that were harvested immediately, leaf 4 was sampled because it emerged during irradiation, whereas in recovery plants, leaf 4 was sampled as a follow-up as well as leaf 7, which emerged during the recovery period. Plant growth, the antioxidative potential, lignin content and the expression profiles of the rice gene Systemic Acquired Deficient 1 (OsSARD1) and of genes related to DNA repair/replication were analyzed. Overall, the responses elicited in leaf 4 of irradiated and recovery plants indicated that this leaf recovered from exposure via the establishment of a new homeostasis. Conversely, radiation-induced responses appeared in leaf 7 of recovery plants even though it was not directly exposed. Therefore, we hypothesize that a signaling mechanism comes into play to establish this radiation-induced signature, otherwise referred to as systemic acquired acclimation.",
keywords = "Ionizing radiation, rice, leaf age, Plant stress response, recovery, Homeostasis, Systemic acquired acclimation",
author = "Kariuki, {Jackline Mwihaki} and Nele Horemans and Eline Saenen and {Van Hees}, May and Michiel Verhoeven and Robin Nauts and {Van Gompel}, Axel and Jean Wannijn and Ann Cuypers",
note = "Score=10",
year = "2019",
month = "6",
day = "1",
doi = "10.1016/j.envexpbot.2019.02.020",
language = "English",
volume = "162",
pages = "157--167",
journal = "Environmental and Experimental Botany",
issn = "0098-8472",
publisher = "Elsevier",

}

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TY - JOUR

T1 - The responses and recovery after gamma irradiation are highly dependent on leaf age at the time of exposure in rice (Oryza sativa L.)

AU - Kariuki, Jackline Mwihaki

AU - Horemans, Nele

AU - Saenen, Eline

AU - Van Hees, May

AU - Verhoeven, Michiel

AU - Nauts, Robin

AU - Van Gompel, Axel

AU - Wannijn, Jean

AU - Cuypers, Ann

N1 - Score=10

PY - 2019/6/1

Y1 - 2019/6/1

N2 - Most plant studies on the effects of ionizing radiation at the individual level mainly focus on the immediate responses and not on the responses elicited following recovery. Therefore, we investigated the effects of gamma radiation in rice seedlings exposed to four different gamma dose rates for 2 weeks, after which half of the plants were harvested immediately and the other half were allowed to recover for another 2 weeks. For plants that were harvested immediately, leaf 4 was sampled because it emerged during irradiation, whereas in recovery plants, leaf 4 was sampled as a follow-up as well as leaf 7, which emerged during the recovery period. Plant growth, the antioxidative potential, lignin content and the expression profiles of the rice gene Systemic Acquired Deficient 1 (OsSARD1) and of genes related to DNA repair/replication were analyzed. Overall, the responses elicited in leaf 4 of irradiated and recovery plants indicated that this leaf recovered from exposure via the establishment of a new homeostasis. Conversely, radiation-induced responses appeared in leaf 7 of recovery plants even though it was not directly exposed. Therefore, we hypothesize that a signaling mechanism comes into play to establish this radiation-induced signature, otherwise referred to as systemic acquired acclimation.

AB - Most plant studies on the effects of ionizing radiation at the individual level mainly focus on the immediate responses and not on the responses elicited following recovery. Therefore, we investigated the effects of gamma radiation in rice seedlings exposed to four different gamma dose rates for 2 weeks, after which half of the plants were harvested immediately and the other half were allowed to recover for another 2 weeks. For plants that were harvested immediately, leaf 4 was sampled because it emerged during irradiation, whereas in recovery plants, leaf 4 was sampled as a follow-up as well as leaf 7, which emerged during the recovery period. Plant growth, the antioxidative potential, lignin content and the expression profiles of the rice gene Systemic Acquired Deficient 1 (OsSARD1) and of genes related to DNA repair/replication were analyzed. Overall, the responses elicited in leaf 4 of irradiated and recovery plants indicated that this leaf recovered from exposure via the establishment of a new homeostasis. Conversely, radiation-induced responses appeared in leaf 7 of recovery plants even though it was not directly exposed. Therefore, we hypothesize that a signaling mechanism comes into play to establish this radiation-induced signature, otherwise referred to as systemic acquired acclimation.

KW - Ionizing radiation

KW - rice

KW - leaf age

KW - Plant stress response

KW - recovery

KW - Homeostasis

KW - Systemic acquired acclimation

UR - http://ecm.sckcen.be/OTCS/llisapi.dll/open/34223762

U2 - 10.1016/j.envexpbot.2019.02.020

DO - 10.1016/j.envexpbot.2019.02.020

M3 - Article

VL - 162

SP - 157

EP - 167

JO - Environmental and Experimental Botany

JF - Environmental and Experimental Botany

SN - 0098-8472

ER -

ID: 5184713