PMID- 21988707
OWN - NLM
STAT- MEDLINE
DCOM- 20121113
LR  - 20220408
IS  - 1600-079X (Electronic)
IS  - 0742-3098 (Linking)
VI  - 53
IP  - 1
DP  - 2012 Aug
TI  - Delayed senescence of apple leaves by exogenous melatonin treatment: toward 
      regulating the ascorbate-glutathione cycle.
PG  - 11-20
LID - 10.1111/j.1600-079X.2011.00966.x [doi]
AB  - The objectives of this study were to test the effects of exogenous melatonin on 
      apple (Malus domestica Borkh. cv. Golden Delicious) leaves and investigate its 
      possible physiological role in delaying leaf senescence. Detached leaves treated 
      with 10 mm melatonin solutions clearly showed a slowing in their process of 
      dark-induced senescence, as evidenced by both biochemical and molecular 
      parameters. Melatonin delayed the normal reduction in chlorophyll content and 
      maximum potential photosystem II efficiency (F(v) /F(m) ). It also suppressed the 
      transcript levels of a key chlorophyll degradation gene, pheide a oxygenase 
      (PAO), and the senescence-associated gene 12 (SAG12). This outcome was thought to 
      be because of the enhanced antioxidant capabilities of melatonin. Indeed, H(2) 
      O(2) accumulation was inhibited by exogenous melatonin, which might have resulted 
      from direct reactive oxygen species scavenging by melatonin and a great 
      enhancement of ascorbate peroxidase (APX; EC 1.11.1.11), which acted on both mRNA 
      and protein activity levels. Melatonin treatment led to the maintenance of higher 
      contents of ascorbic acid (AsA) and glutathione (GSH) but less dehydroascorbate 
      (DHA) and oxidized glutathione (GSSG) compared with the control, possibly through 
      its regulation of the AsA-GSH cycle.
CI  - (c) 2011 John Wiley & Sons A/S.
FAU - Wang, Ping
AU  - Wang P
AD  - State Key Laboratory of Crop Stress Biology in Arid Areas/College of 
      Horticulture, Northwest A&F University, Yangling, Shaanxi, China.
FAU - Yin, Lihua
AU  - Yin L
FAU - Liang, Dong
AU  - Liang D
FAU - Li, Chao
AU  - Li C
FAU - Ma, Fengwang
AU  - Ma F
FAU - Yue, Zhiyong
AU  - Yue Z
LA  - eng
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
DEP - 20111012
PL  - England
TA  - J Pineal Res
JT  - Journal of pineal research
JID - 8504412
RN  - 0 (Antioxidants)
RN  - 0 (Oxidants)
RN  - 0 (Photosystem II Protein Complex)
RN  - 0 (Plant Proteins)
RN  - 1406-65-1 (Chlorophyll)
RN  - BBX060AN9V (Hydrogen Peroxide)
RN  - EC 1.11.1.11 (Ascorbate Peroxidases)
RN  - EC 1.13.- (Oxygenases)
RN  - EC 1.13.- (pheide a oxygenase)
RN  - EC 3.4.22.- (Cysteine Endopeptidases)
RN  - GAN16C9B8O (Glutathione)
RN  - JL5DK93RCL (Melatonin)
RN  - PQ6CK8PD0R (Ascorbic Acid)
SB  - IM
MH  - Antioxidants/*pharmacology
MH  - Ascorbate Peroxidases/metabolism
MH  - Ascorbic Acid/metabolism
MH  - Cellular Senescence/*drug effects
MH  - Chlorophyll/metabolism
MH  - Cysteine Endopeptidases/metabolism
MH  - Glutathione/metabolism
MH  - Hydrogen Peroxide/pharmacology
MH  - Malus/cytology/*metabolism
MH  - Melatonin/*pharmacology
MH  - Oxidants/pharmacology
MH  - Oxidation-Reduction/drug effects
MH  - Oxygenases/metabolism
MH  - Photosystem II Protein Complex/metabolism
MH  - Plant Leaves/cytology/*metabolism
MH  - Plant Proteins/metabolism
EDAT- 2011/10/13 06:00
MHDA- 2012/11/14 06:00
CRDT- 2011/10/13 06:00
PHST- 2011/10/13 06:00 [entrez]
PHST- 2011/10/13 06:00 [pubmed]
PHST- 2012/11/14 06:00 [medline]
AID - 10.1111/j.1600-079X.2011.00966.x [doi]
PST - ppublish
SO  - J Pineal Res. 2012 Aug;53(1):11-20. doi: 10.1111/j.1600-079X.2011.00966.x. Epub 
      2011 Oct 12.