Über die „keimungshemmenden“ Stoffe aus Früchten

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Abstract
Contradictory viewpoints on the nature and mode of action of germination-inhibiting substances, the so-called "blastokolins," have been published for some decades. Results obtained by the author from more recent expts. on cacao fruits and seeds indicate that this group of substances is worthy of further investigation. The mucilaginous coat of the seed after maturity of the fruit contains a substance which, tested on Lepidium. inhibits germination or sometimes only the growth of the primary root. Nevertheless, cacao seeds whose pericarp has molded usually germinate while still contained in the fruit, that is to say, inside the blastokolin"-containing mucilaginous sheath. Another evidence for the biological importance of the inhibition produced by these substances may be seen in suppression of growth of Lepidium seeds arranged around a germinating cacao seed. Those which are further away from the cacao seed undergo less suppression of growth.

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