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Comparative SEM investigations of the abaxial leaf epidermis of Quercus cerris L. var. cerris Loud. and Quercus cerris L. var.austriaca [Willd.] Loud. from Croatia

100%

Bacic T.

Acta Biologica Cracoviensia. Series Botanica

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1997

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tom 39

The study involved screening and SEM analysis of the micromorphological features of the abaxial leaf surface of ordinary epidermal cells, stomata and trichomes of two varieties of Quercus cerris L. The results indicated features distinguishing the two varieties: in var. austriaca the wax is present as crystalloids in the form of simple platelets, while in var. cerris the wax appears as a smooth layer. Moreover, the results point to some special characteristics of Q. cerris in relation to other Quercus species. The approximately square, not ellipsoid, shape of the peristomatal rims is typical of the species Q. cerris L.

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Metoda izolowania epidermy lisci pomidora i ogorka dla mikroskopowej oceny rozwoju grzybow patogenicznych

80%

Dyki B., Harbas H.

Acta Agrobotanica

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1996

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tom 49

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nr 1-2

123-129

There has been described a new, easy method of isolation and staining of epidermis from leaves and cotyledon of healthy cucumber and infected one with the fungus Pseudoperonospora cubensis Berk and Curt and from tomato leaves infected with the fungus Oidiurn licopersicum Cook and Massee. The epidermis was taken of with the use of transparent Scotch from the leaves and stained with toluidyne blue. This method is helpful in distinguising the differences in a structure of epidermis of healthy and infected leaves and in estimating the following: stage of development of the fungus on epidermis, number and size of haustorium in epidermis cells, number of spores of a fungus on the certain surface of the host leaf. This method is valuable because it enables to protect the material for a long time, which is very important during testing a big number of plants.

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Preliminary report on epicuticular wax surface condition on stomata of Abies alba Mill. needles from Risnjak National Park in Croatia

80%

Bacic T., Popovic Z.

Acta Biologica Cracoviensia. Series Botanica

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1998

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tom 40

The structure of epicuticular wax on the stomata surface in both very young and one-year-old fir needles from Risnjak National Park in Croatia were examined with a scanning electron microscope. The stomata surface is first covered with wax crystalloids in the form of rodlets. In the course of time the rodlets become fused and agglomerated into amorphous wax crusts; this process begins very early. In addition to wax crystalloid quantitative estimation indicates a relatively large total amount of amorphous wax in very young needles (~20 days) and a very high percentage of amorphous wax crusts in one-year-old needles. Wax crusts cover stomatal pores in addition to the rims, making normal gas exchange impossible. The early start of wax degradation may be interpreted as a possible result of air pollution.

Ograniczanie wyników

2 Acta Biologica Cracoviensia. Series Botanica

1 Acta Agrobotanica

2 Bacic T.

1 Dyki B.

1 Harbas H.

1 Popovic Z.

1 1998

1 1997

1 1996

Comparative SEM investigations of the abaxial leaf epidermis of Quercus cerris L. var. cerris Loud. and Quercus cerris L. var.austriaca [Willd.] Loud. from Croatia

Metoda izolowania epidermy lisci pomidora i ogorka dla mikroskopowej oceny rozwoju grzybow patogenicznych

Preliminary report on epicuticular wax surface condition on stomata of Abies alba Mill. needles from Risnjak National Park in Croatia