CHLORINE TOXICITY IN SEEDLINGS OF Persea Americana var drymifolia and P. schiedeana

Abstract

Plants of P. americana var drymifolia, Mexican race,
and of P. schiedeana Ness (chinini) were grown in soil of

electrical conductivity 5.5 mmhos cm^_1 and pH 7.0 The symptoms they presented were marginal or apical necrosis, leaf drop and dieback of twigs. It was found that Cl con­tent was very high in both species, being much higher in
the roots of P. schiedeana; the leaf content of Cl was similar in both species. The per cent of plants which survived was 4.8 for P. schiedeana and 50 for P. americana
var drymifolia.