the mannitol concentration

[Dong]

Is there anyone could tell the contration of mannitol that equal to 20mM K2SO4 added to the agar plate ?

and the fomula ion stress equal to the mannitol concentration ?


thanks for help !

[Dong]

Is there anyone could help me ?

[Jillo725]

i hate plants. =p

[JackBean]

how can you compare manitol and potassium sulphate? One form three ions, whereas the other is neutral and could serve as carbon source

[Dong]

the use of mannitol is just intended to check wether the effect of ions addition is caused by the increased water pressure ?
So, I want to know
the phenomen (addition 20mM K2SO4 cause plant grows poor) is because of water pressure enhanced ?
But the problem is the concentration that equals to 20mM K2SO4 .

20mM K2SO4 = ? mannitol

Thanks !

[Dong]

some friends told me ,
in solution, 20mM K2SO4 = 40 or 60 mM Mannitol
but they can not offer the souce !

I don't know whether that is right .

anyone could tell me ?

Thanks

[JackBean]

Look to Vyroubalová et al. 2009; we have used PEG, but in Materials and Methods is reference to article, from which we took the concentration, there may be also mannitol.

However, as I said, mannitol will influence the plant growth by itself, so if you want to see only the effect of osmotic pressure, you should use something inactive.