Grandpa's biology - 18


hormone balance, cell regulation, cell function, plant evolution,
host/parasite relations ..., the biology of grandpa in images

Green leaves, yellow leaves, dead leaves...
a summary of plants' evolution (logo)

Why such a titel? In order to permit to Charlie, and to all the children in the world, to say, one day, studying their lessons: that's Grandpa's biology!

Cell function, in the case
of unicellular organisms

Cells function, in the case
of pluricellular organisms

The black arrows correspond to reactions of synthesis and degradation requiring the intervention of specific enzymes..., the white arrows indicate that these are simple reactions of exchange, balance, regulation - hypothesis 05.

The notions of balance and regulation, two sides of the same problem... In this case: the evolution of the host/parasite relations existing between the variety of tomato Supermarmande and the fungus Fusarium lycopersi, in relation with auxin and gibberellin treatments - first tests.

Fusariosis - in summer

Fusariosis - in winter

A plant subjected to double attack by fungus and virus (chapter 14)

Evolution of the Fusarium in relation with the sugars/
nitrogen ratio of an liquid articial medium - chapter 11)

Influence of auxin and gibberellin treatments on the sugars/ nitrogen ratio of the plants - plant evolution

Grandpa's conclusions: the relations existing in the plants between the auxin/gibberellin balance and the evolution of leaves and roots ... plant evolution




presentation/contentsa work of popularizationstory of modern biologythe point of view of French citizenssome basic concepts to recallgrandpa's hypothesishow to verify this hypothesisfirst testsevolution of plants according to auxin and gibberellin treatmentshost-parasite relationsaction of the fungus on the plantaction in return of the plant on the fungusaction of the virus on the plantaction in return of the plant on the virusa plant subjected to double attack by both fungus and virusthe scientific debatethe Peter principleconclusion - answer to some questionsimages

Grandpa's biology - 18