back to TZ home
back to illustrations list
GRABE, D.F. (ed.) 1970. Tetrazolium Testing Handbook for Agricultural Seeds. Contribution No. 29
       to the Handbook on Seed Testing,  AOSA.   Plate IV Timothy.

Photos: Frieda Wertman

Left:                                                            Right:
All seeds germinable.                                    First seed: Germinable. Embryo completely stained
Embryos completely stained.                         Second seed: Non-germinable.  Plumule dark stained.
                                                                    Third seed: Non-germinable.  Lower half of embryo unstained.
                                                                    Fourth seed: Non-germinable.  Upper half of embryo unstained.