Titre du document / Document title

The germination of mucilaginous seeds of Plantago coronopus, Reboudia pinnata, and Carrichtera annua on cyanobacterial soil crust from the Negev Desert

Auteur(s) / Author(s)

ZAADY E. ⁽¹⁾ ; GUTTERMAN Y. ⁽²⁾ ; BOEKEN B. ⁽²⁾ ;

Affiliation(s) du ou des auteurs / Author(s) Affiliation(s)

⁽¹⁾ Desertification and Restoration Ecology Research Center, Jacob Blaustein Institute for Desert Research Ben-Gurion University of the Negev, Sede Boker Campus 84990, ISRAEL
⁽²⁾ Unit for Ecophysiology and Introduction of Desert Plants and Department of Life Sciences, Jacob Blaustein Institute for Desert Research Ben-Gurion University of the Negev, Sede Boker Campus 84990, ISRAEL

Résumé / Abstract

We studied the effect of intact, crushed or sterile cyanobacterial soil crust from the Negev Desert highlands of Israel as substrates for the germination of seeds of three annual plant species from local populations that produce mucilaginous seeds Plantago coronopus, Reboudia pinnata and Carrichtera annua. Mucilaginous seeds of these species were wetted on local intact cyanobacterial soil crust which inhibited their germination in comparison with their germination on filter paper. However, the percentage of germination of each species differed on sterile and crushed soil crust after 72 h of wetting. Germination of Plantago coronopus seeds was inhibited mechanically and biologically on intact soil crust, since it was significantly higher on both crushed and sterile soil crust. Germination of Reboudia pinnata seeds was slightly mechanically and biologically inhibited on intact soil crust, but germination on live crushed crust was higher than on sterile crushed crust. By contrast, germination of Carrichtera annua seeds was not mechanically inhibited by live soil crust but there was significant biological acceleration of germination on intact soil crust relative to crushed soil crust. Each of the three species exhibited different requirements for germination. Germination of P. coronopus is promoted by disturbances and removing the crust components (including its biological and structural effects). R. pinnata and C. annua germination is less affected by crust disturbance but is generally inhibited after removing the live components of the cyanobacterial crust. These species differences suggest different functions of the mucilage of the seed coat for the three species.

Revue / Journal Title

Plant and soil   ISSN 0032-079X   CODEN PLSOA2 

Source / Source

1997, vol. 190, n^o2, pp. 247-252 (31 ref.)

Langue / Language

Anglais

Editeur / Publisher

Springer, Dordrecht, PAYS-BAS  (1949) (Revue)

Mots-clés anglais / English Keywords

Mechanical characteristic ; Biological effect ; Edaphic factor ; Germination ; Desert ; Seeds ; Cyanobacteria ; Mucilage ; Israel ; Crust ; Microbial origin ; Desert soil ; Laboratory study ; mechanical effects ; Carrichtera annua ; Plantago coronopus ; Reboudia pinnata ; Bacteria ; Asia ; Environmental factor ; Vegetal microorganism relation ; Soil plant relation ; Arid environment ; Terrestrial environment ; Cruciferae ; Dicotyledones ; Angiospermae ; Spermatophyta ; Plantaginaceae ; Annual plant ; Xerophyte ; West Asia ; Mediterranean Basin ;

Mots-clés français / French Keywords

Caractéristique mécanique ; Effet biologique ; Facteur édaphique ; Germination ; Désert ; Graine ; Cyanobacteria ; Mucilage ; Israël ; Croûte ; Origine microbienne ; Sol désertique ; Etude en laboratoire ; Neguev ; Effet mécanique ; Carrichtera annua ; Plantago coronopus ; Reboudia pinnata ; Bactérie ; Asie ; Facteur milieu ; Relation microorganisme végétal ; Relation sol plante ; Milieu aride ; Milieu terrestre ; Cruciferae ; Dicotyledones ; Angiospermae ; Spermatophyta ; Plantaginaceae ; Plante annuelle ; Xérophyte ; Asie occidentale ; Bassin méditerranéen ;

Mots-clés espagnols / Spanish Keywords

Característica mecánica ; Efecto biológico ; Factor edáfico ; Germinación ; Desierto ; Semillas ; Cyanobacteria ; Mucílago ; Israel ; Corteza ; Origen microbiano ; Suelo desértico ; Estudio en laboratorio ; Carrichtera annua ; Plantago coronopus ; Reboudia pinnata ; Bacteria ; Asia ; Factor medio ; Relación microorganismo vegetal ; Relación suelo planta ; Medio árido ; Medio terrestre ; Cruciferae ; Dicotyledones ; Angiospermae ; Spermatophyta ; Plantaginaceae ; Planta anual ; Xerófito ; Asia occidental ; Cuenca mediterránea ;

Localisation / Location

INIST-CNRS, Cote INIST : 4772, 35400006766670.0070