G. Fekete szerk.: Studia Botanica Hungarica 9. 1974 (Budapest, 1974)

Szujkóné Lacza, Júlia: Tendenciák vagy szignifikáns differenciák érvényesülnek a Zalensky-szabályban? (Kvantitatív anatómiai vizsgálatok a Pimpinella anisum L. levelein)

of the larger transport bundles, by means of the short transport within the bundle sheath parenchyma. The role of the secretory channels may consist of energy accumulation along the transport bundles. On the basis of examination of the mean values of eleven anatomical characteristics per leaf, a.4., as, ag, and the stoma frequency counted along the line of transverse section on the underside (a.^) evolve according to Zalensky's law. hi the leaf transverse section area, the spongy and palisade parenchyma areas this trend fails to prevail completely, manifestly owing to the not wholly unidirectional effect of the environmental factors. The formation of the mean values of characteristic ag is modified by the divergence of 90° of each subsequent leaf on the stem. The area of a^^ decreases upwards along the stem. The results of variance analysises. - The number of S.Ds. for the anatomical characteristics are summarized in Table 2. The leaves appearing successively along the stem differ - when each one is compared to all other ones - in most cases in the number of epithelial cells per mesophyll area. Thereafter the diminishing sequence is as follows: a9, as, as, aio, a

2

, aß. The S.Ds. between the anatomical characteristics and the leaves could most concisely be arrenged in a matrix (Table 3); the distribution of S.Ds. per leaf-pairs (leaf levels) is represented by the half matrix in Table 4. (According to the sums of the last column in Table 3, leaves 1. and 3,are those from which the ones appearing from the insertion points above them differ most). The values of columns I and II in Table 4 prove also statistically the validity 1 of ZALENSKY'

s complex of phenomena. Concurrently, the frequency distribution of S.Ds. per leaf reveals that in the case of Pimpinella anisum the formation of the values of the investigated characteristics depends not only on environmental conditions, but presumably also on the architectural features of the species. According to the values of column III in Table 4, the cause of S.D. 182 is mostly attributable to leaf 10 and then to leaf l.Tbe leaves situated along the middle part of the stem differ at about the same rate from both those above and below them

. Accordingly, ZALENSKY' s law holds for the leaf anatomical characteristics of Pimpi nella anisum

, for the trend of their mean values, and also for the distribution frequency of the S.Ds. In a more generalized construction: In all probability the leaf characteristics of individuals of flowering plants allow to calculate by a statistical probability their reactions of corresponding types to the seasonal changes of environmental effects. Conventionally, the quantitative anatomical investigations refer to the stoma number per surface area, to the proportion of palisade per spongy parenchymes, to the establishment of the thickness of the two assimilating layers. In 1972 and 1973, the author studied the presence and absence, respectively, of the S.Ds. concerning the above characteristics on leaves appearing from the sequence of insertion points on the stem of Pimpinella anisum L. (cf. Table 5). Stoma numbers on the underside of the leaves and the thickness of the palisade parenchyme gave significant differences in both years, whereas stoma numbers on the upperside, the rate of palisade per spongy parenchymes, and the thickness of the spongy pa-