PMID- 32961433
OWN - NLM
STAT- MEDLINE
DCOM- 20210113
LR  - 20211204
IS  - 1873-2690 (Electronic)
IS  - 0981-9428 (Linking)
VI  - 156
DP  - 2020 Nov
TI  - Drought stress improved the capacity of Rhizophagus irregularis for inducing the 
      accumulation of oleuropein and mannitol in olive (Olea europaea) roots.
PG  - 178-191
LID - S0981-9428(20)30459-9 [pii]
LID - 10.1016/j.plaphy.2020.09.011 [doi]
AB  - Olive trees are often subjected to a prolonged dry season with low water 
      availability, which induces oxidative stress. Arbuscular mycorrhizal (AM) 
      symbioses can improve olive plant tolerance to water deficit. This study 
      investigated several aspects related to drought tolerance in AM fungi olive 
      plants. Non-AM and AM plants were grown under well-watered or drought-stressed 
      conditions, and mycorrhizal growth response, neutral lipid fatty acid 
      (NLFA)16:1omega5 and phospholipid fatty acid (PLFA) 16:1omega5 in roots (intraradical 
      mycelium) and in soil (extraradical mycelium), carbohydrates (monosaccharides, 
      disaccharides and polyols) and phenolic compounds (phenolic alcohols, flavonoids, 
      lignans, secoiridoids and hydroxycinnamic acid derivatives) were determined. 
      Results showed that the amounts of PLFA 16:1omega5 and NLFA 16:1omega5 were significantly 
      influenced by drought stress conditions. The NLFA 16:1omega5/PLFA 16:1omega5 ratio showed 
      a dramatic decrease (-62%) with the application of water deficit stress, 
      indicating that AM fungi allocated low carbon to storage structures under stress 
      conditions. Mannitol and verbascoside are the main compounds detected in the 
      roots of well-watered plants, whereas oleuropein and mannitol are the main 
      compounds differentially accumulated in the roots of water-stressed plants. The 
      oleuropein/verbascoside ratio increased in the case of drought-stressed AM plants 
      by 30%, while the mannitol/oleuropein ratio was decreased by 46%, when compared 
      to the non-AM stressed plants. Mycorrhization therefore oriented the flux toward 
      the biosynthetic pathway of oleuropein and the data suggest that sugar and 
      phenolic compound metabolism may have been redirected to the formation of 
      oleuropein in roots of AM stressed plants, that may underlie their enhanced 
      tolerance to drought stress.
CI  - Copyright (c) 2020 Elsevier Masson SAS. All rights reserved.
FAU - Mechri, Beligh
AU  - Mechri B
AD  - Laboratory of Biochemistry, USCR Mass Spectrometry, LR-NAFS/LR12ES05 Nutrition 
      Functional Foods and Vascular Health, Faculty of Medicine, University of 
      Monastir, 5019, Monastir, Tunisia. Electronic address: beligh.mechri77@yahoo.fr.
FAU - Tekaya, Meriem
AU  - Tekaya M
AD  - Laboratory of Biochemistry, USCR Mass Spectrometry, LR-NAFS/LR12ES05 Nutrition 
      Functional Foods and Vascular Health, Faculty of Medicine, University of 
      Monastir, 5019, Monastir, Tunisia.
FAU - Attia, Faouzi
AU  - Attia F
AD  - The Olive Tree Institute, Unit Specializing in Sousse, Ibn Khaldoun Street B.P. 
      14, 4061, Sousse, Tunisia.
FAU - Hammami, Mohamed
AU  - Hammami M
AD  - Laboratory of Biochemistry, USCR Mass Spectrometry, LR-NAFS/LR12ES05 Nutrition 
      Functional Foods and Vascular Health, Faculty of Medicine, University of 
      Monastir, 5019, Monastir, Tunisia.
FAU - Chehab, Hechmi
AU  - Chehab H
AD  - The Olive Tree Institute, Unit Specializing in Sousse, Ibn Khaldoun Street B.P. 
      14, 4061, Sousse, Tunisia.
LA  - eng
PT  - Journal Article
DEP - 20200914
PL  - France
TA  - Plant Physiol Biochem
JT  - Plant physiology and biochemistry : PPB
JID - 9882449
RN  - 0 (Iridoid Glucosides)
RN  - 0 (Iridoids)
RN  - 2O4553545L (oleuropein)
RN  - 3OWL53L36A (Mannitol)
RN  - Rhizophagus irregularis
SB  - IM
MH  - *Droughts
MH  - Fungi/*physiology
MH  - Iridoid Glucosides
MH  - Iridoids/*metabolism
MH  - Mannitol/*metabolism
MH  - Mycorrhizae/physiology
MH  - Olea/*metabolism/microbiology
MH  - Plant Roots/*metabolism
MH  - Stress, Physiological
MH  - Symbiosis
OTO - NOTNLM
OT  - Arbuscular mycorrhizal
OT  - Drought
OT  - Mannitol
OT  - Olea europaea
OT  - Oleuropein
OT  - Priming
EDAT- 2020/09/23 06:00
MHDA- 2021/01/14 06:00
CRDT- 2020/09/22 20:19
PHST- 2020/07/18 00:00 [received]
PHST- 2020/09/04 00:00 [accepted]
PHST- 2020/09/23 06:00 [pubmed]
PHST- 2021/01/14 06:00 [medline]
PHST- 2020/09/22 20:19 [entrez]
AID - S0981-9428(20)30459-9 [pii]
AID - 10.1016/j.plaphy.2020.09.011 [doi]
PST - ppublish
SO  - Plant Physiol Biochem. 2020 Nov;156:178-191. doi: 10.1016/j.plaphy.2020.09.011. 
      Epub 2020 Sep 14.