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Seed germination od several invasive species potentially useful for biomass production or revegetation purposes under semiarid conditions

100%

Travlos I. S.

Acta Biologica Cracoviensia. Series Botanica

2009

tom 51

nr 1

35-37

The introduction of several plant species to areas beyond their natural distribution has been a global phenomenon that poses critical problems and challenges for the conservation and management of many agricultural and natural ecosystems. Shrub medick (Medicago arborea L.), Spanish broom (Spartium junceum L.) and chaste tree (Vitex agnus castus L.) are three of the most important native shrubs in arid and semiarid Mediterranean regions, being noxious invasive species for some areas but in some cases remarkably useful for several purposes. An understanding of their seed germination and seedling emergence should prove useful for their management. Laboratory and greenhouse experiments were done to examine the effects of high temperature on seed gemination and seedling emergence. Dry heat benefitted (or at high temperatures damaged) seed germination and emergence. This implies potential effects of fire on the dynamics of populations of M. arborea, S. junceum and V. agnus castus, a factor which should be taken into account as fire is a frequent component of Mediterranean-type ecosystems.

Anatomical and chemical adaptation of Spartium junceum L. in arid habitat

100%

Bezic N., Dunkic V., Radonic A.

Acta Biologica Cracoviensia. Series Botanica

2003

tom 45

nr 2

A number of anatomical adaptations to an arid habitat can be noted in the microscopic structure of Spartium junceum L. vegetative organs. The xerophytic adaptation of the leaf is seen in its short life and the transformation of its inner structure, with palisade parenchyma dominating. The top part of the stem has taken over the leaf function, while sclerenchyma fiber and conductive elements occupy most of its secondary units. A peculiar feature of the primary structure of the root is its incompletely developed endodermis, and the secondary structure points to its storage and mechanical roles. GC/MS analyses of the essential oils showed that they consist mainly of monoterpene hydrocarbons with α-thujene as the main compound. The essential oils also play a xeromorphic role in this plant species.

Ograniczanie wyników

2 Acta Biologica Cracoviensia. Series Botanica

1 Bezic N.

1 Dunkic V.

1 Radonic A.

1 Travlos I. S.

1 2009

1 2003

Wyniki wyszukiwania

Seed germination od several invasive species potentially useful for biomass production or revegetation purposes under semiarid conditions

Anatomical and chemical adaptation of Spartium junceum L. in arid habitat