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The importance of B6 homeostasis in plant development

University of Geneva - Bourses-etudiants.ma

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oxidoreductases transferases hydrolases lyases isomerases

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Is the homeostasis of B6 vitamers important? What is the role of B6 vitamers that do not act as coenzymes? What is the role of SOS4?

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PLP is an antagonist of P2X ion channels in animals

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5’ 3’ sos4-1  (G A) sno1  (G A)

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How B6 content and homeostasis are affected in  sos4  mutants? Why are  sos4  plants sensitive to salt? Is K+/Na+ homeostasis disturbed?

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snol
5'
GK-891A06
GK-891A12 (sos4-3)
sos4-1
3'
SOS4 (At5g37850.1)

sos4-1/pSOS4: sos4-3pSOS4:
SOS4-YFP SOS4-YFP
Sosa-I
sos4-3
sno 1

Snol
sos4-11pSOS4
: SOS4- YFp
sos4-3/pSOS4:
S OS4-

ddA-tsos:
nosd/€.sos
-nos:
>SOSdu-É.sos
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Phenotype of  sos4  mutants is salt independent

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B6 homeostasis is disturbed in  sos4  plants

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SOS4  is expressed in both shoots and roots

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sos4-1/psos4: sos4-Ypsos4:
SO S 4 _ygp
Col-O
sos4-t
sos4-J
snc•'

Root development of  sos4  mutants is erroneous

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Perturbances of  sos4  mutants take origin in the shoot

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Growth in low light alleviates  sos4  defects

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What is the role of B6 homeostasis in plant reducing power Which B6 vitamers play a role in ROS scavenging? How?

Phenotype of  sos4  mutants is independent of salt PLP content is decreased in  sos4  mutants The aberrations in B6 balance lead to defects in root development  Defects of  sos4  mutants take origin in the shoot ROS scavenging is compromised in the mutants

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Teresa Fitzpatrick Maite  Colinas  Elisa  Dell’Aglio Paulina  Flis   ( University of Nottingham ) David E. Salt  ( University of Nottingham ) Celine Roux Mireille De Meyer Ivan  Dalvit Zeenat   Noordally Manuel Hoffmann Marta Pesquera Peter Farkas Priscille  Steensma Celso  Trichtinger

Join the GI-ACE team: Research Fellow/Associate - based out of the  University of Nottingham in the UK - Global Integrity Anti-Corruption  Evidence

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