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Germination requirements of two sheep - preferred grasses [Hordeum comosum and Koeleria vurilochensis var. patagonica] from semiarid Patagonian steppes
Grazing by domestic exotic herbivores on native vegetation in Patagonian steppes has led to the deterioration of forage resources, where grasses are replaced by shrubs, and preferred grasses by non-preferred ones. Therefore, attempts at breeding and regeneration should start by identifying species with potential forage capability. Two perennial high-preferred species are the focus of this paper: Hordeum comosum and Koeleria vurilochensis. For the first time, we studied their morphological traits, dormancy level, and their temperature and water germination requirements, through thermal- and hydrotime models. H. comosum seeds were solid, large and heavy, while K. vurilochensis seeds were soft, small and light. Neither light-quality nor alternating temperature affected the dormancy level in seeds of both species. Seeds of H. comosum and K. vurilochensis required, respectively, 768.74 °Ch and 2217.89 °Ch to germinate; alternatively, base temperature was higher for H. comosum than for K. vurilochensis. The hydrotime required by H. comosum was 26 MPah and 110 Mpah for K. vurilochensis but, base water potential was -0.99 MPa and -1.45 MPa, respectively. For all the conditions, H. comosum displayed a higher germination rate compared to K. vurilochensis seeds. Deeper knowledge on the morphological and germination traits of seeds is a key step toward breeding and restoration of forage potential species.
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| Language: | eng |
| Subjects: | HYDROTIME, NATIVE FORAGE SPECIES, SEED TRAITS, TEMPERATURE REQUIREMENT, THERMAL-TIME, WATER AVAILABILITY, DOMESTIC SPECIES, DORMANCY, FORAGE, GERMINATION, GRASS, HERBIVORE, LIGHT QUALITY, MORPHOLOGY, PERENNIAL PLANT, PLANT WATER RELATIONS, SEMIARID REGION, SHEEP, SHRUB, STEPPE, TEMPERATURE EFFECT, PATAGONIA, HORDEUM, HORDEUM COMOSUM, KOELERIA, OVIS ARIES, POACEAE, |
| Online Access: | http://ceiba.agro.uba.ar/cgi-bin/koha/opac-detail.pl?biblionumber=46614 |
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KOHA-OAI-AGRO:466142023-08-16T10:01:19Zhttp://ceiba.agro.uba.ar/cgi-bin/koha/opac-detail.pl?biblionumber=46614AAGGermination requirements of two sheep - preferred grasses [Hordeum comosum and Koeleria vurilochensis var. patagonica] from semiarid Patagonian steppesGundel, Pedro EmilioIrisarri, Jorge Gonzalo NicolásSorzoli, Nadia SoledadMosso, Clara EmiliaGarcía Martínez, Guillermo CarlosGolluscio, Rodolfo Angeltextengapplication/pdfGrazing by domestic exotic herbivores on native vegetation in Patagonian steppes has led to the deterioration of forage resources, where grasses are replaced by shrubs, and preferred grasses by non-preferred ones. Therefore, attempts at breeding and regeneration should start by identifying species with potential forage capability. Two perennial high-preferred species are the focus of this paper: Hordeum comosum and Koeleria vurilochensis. For the first time, we studied their morphological traits, dormancy level, and their temperature and water germination requirements, through thermal- and hydrotime models. H. comosum seeds were solid, large and heavy, while K. vurilochensis seeds were soft, small and light. Neither light-quality nor alternating temperature affected the dormancy level in seeds of both species. Seeds of H. comosum and K. vurilochensis required, respectively, 768.74 °Ch and 2217.89 °Ch to germinate; alternatively, base temperature was higher for H. comosum than for K. vurilochensis. The hydrotime required by H. comosum was 26 MPah and 110 Mpah for K. vurilochensis but, base water potential was -0.99 MPa and -1.45 MPa, respectively. For all the conditions, H. comosum displayed a higher germination rate compared to K. vurilochensis seeds. Deeper knowledge on the morphological and germination traits of seeds is a key step toward breeding and restoration of forage potential species.Grazing by domestic exotic herbivores on native vegetation in Patagonian steppes has led to the deterioration of forage resources, where grasses are replaced by shrubs, and preferred grasses by non-preferred ones. Therefore, attempts at breeding and regeneration should start by identifying species with potential forage capability. Two perennial high-preferred species are the focus of this paper: Hordeum comosum and Koeleria vurilochensis. For the first time, we studied their morphological traits, dormancy level, and their temperature and water germination requirements, through thermal- and hydrotime models. H. comosum seeds were solid, large and heavy, while K. vurilochensis seeds were soft, small and light. Neither light-quality nor alternating temperature affected the dormancy level in seeds of both species. Seeds of H. comosum and K. vurilochensis required, respectively, 768.74 °Ch and 2217.89 °Ch to germinate; alternatively, base temperature was higher for H. comosum than for K. vurilochensis. The hydrotime required by H. comosum was 26 MPah and 110 Mpah for K. vurilochensis but, base water potential was -0.99 MPa and -1.45 MPa, respectively. For all the conditions, H. comosum displayed a higher germination rate compared to K. vurilochensis seeds. Deeper knowledge on the morphological and germination traits of seeds is a key step toward breeding and restoration of forage potential species.HYDROTIMENATIVE FORAGE SPECIESSEED TRAITSTEMPERATURE REQUIREMENTTHERMAL-TIMEWATER AVAILABILITYDOMESTIC SPECIESDORMANCYFORAGEGERMINATIONGRASSHERBIVORELIGHT QUALITYMORPHOLOGYPERENNIAL PLANTPLANT WATER RELATIONSSEMIARID REGIONSHEEPSHRUBSTEPPETEMPERATURE EFFECTWATER AVAILABILITYPATAGONIAHORDEUMHORDEUM COMOSUMKOELERIAOVIS ARIESPOACEAEJournal of Arid Environments |
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HYDROTIME NATIVE FORAGE SPECIES SEED TRAITS TEMPERATURE REQUIREMENT THERMAL-TIME WATER AVAILABILITY DOMESTIC SPECIES DORMANCY FORAGE GERMINATION GRASS HERBIVORE LIGHT QUALITY MORPHOLOGY PERENNIAL PLANT PLANT WATER RELATIONS SEMIARID REGION SHEEP SHRUB STEPPE TEMPERATURE EFFECT WATER AVAILABILITY PATAGONIA HORDEUM HORDEUM COMOSUM KOELERIA OVIS ARIES POACEAE HYDROTIME NATIVE FORAGE SPECIES SEED TRAITS TEMPERATURE REQUIREMENT THERMAL-TIME WATER AVAILABILITY DOMESTIC SPECIES DORMANCY FORAGE GERMINATION GRASS HERBIVORE LIGHT QUALITY MORPHOLOGY PERENNIAL PLANT PLANT WATER RELATIONS SEMIARID REGION SHEEP SHRUB STEPPE TEMPERATURE EFFECT WATER AVAILABILITY PATAGONIA HORDEUM HORDEUM COMOSUM KOELERIA OVIS ARIES POACEAE |
| spellingShingle |
HYDROTIME NATIVE FORAGE SPECIES SEED TRAITS TEMPERATURE REQUIREMENT THERMAL-TIME WATER AVAILABILITY DOMESTIC SPECIES DORMANCY FORAGE GERMINATION GRASS HERBIVORE LIGHT QUALITY MORPHOLOGY PERENNIAL PLANT PLANT WATER RELATIONS SEMIARID REGION SHEEP SHRUB STEPPE TEMPERATURE EFFECT WATER AVAILABILITY PATAGONIA HORDEUM HORDEUM COMOSUM KOELERIA OVIS ARIES POACEAE HYDROTIME NATIVE FORAGE SPECIES SEED TRAITS TEMPERATURE REQUIREMENT THERMAL-TIME WATER AVAILABILITY DOMESTIC SPECIES DORMANCY FORAGE GERMINATION GRASS HERBIVORE LIGHT QUALITY MORPHOLOGY PERENNIAL PLANT PLANT WATER RELATIONS SEMIARID REGION SHEEP SHRUB STEPPE TEMPERATURE EFFECT WATER AVAILABILITY PATAGONIA HORDEUM HORDEUM COMOSUM KOELERIA OVIS ARIES POACEAE Gundel, Pedro Emilio Irisarri, Jorge Gonzalo Nicolás Sorzoli, Nadia Soledad Mosso, Clara Emilia García Martínez, Guillermo Carlos Golluscio, Rodolfo Angel Germination requirements of two sheep - preferred grasses [Hordeum comosum and Koeleria vurilochensis var. patagonica] from semiarid Patagonian steppes |
| description |
Grazing by domestic exotic herbivores on native vegetation in Patagonian steppes has led to the deterioration of forage resources, where grasses are replaced by shrubs, and preferred grasses by non-preferred ones. Therefore, attempts at breeding and regeneration should start by identifying species with potential forage capability. Two perennial high-preferred species are the focus of this paper: Hordeum comosum and Koeleria vurilochensis. For the first time, we studied their morphological traits, dormancy level, and their temperature and water germination requirements, through thermal- and hydrotime models. H. comosum seeds were solid, large and heavy, while K. vurilochensis seeds were soft, small and light. Neither light-quality nor alternating temperature affected the dormancy level in seeds of both species. Seeds of H. comosum and K. vurilochensis required, respectively, 768.74 °Ch and 2217.89 °Ch to germinate; alternatively, base temperature was higher for H. comosum than for K. vurilochensis. The hydrotime required by H. comosum was 26 MPah and 110 Mpah for K. vurilochensis but, base water potential was -0.99 MPa and -1.45 MPa, respectively. For all the conditions, H. comosum displayed a higher germination rate compared to K. vurilochensis seeds. Deeper knowledge on the morphological and germination traits of seeds is a key step toward breeding and restoration of forage potential species. |
| format |
Texto |
| topic_facet |
HYDROTIME NATIVE FORAGE SPECIES SEED TRAITS TEMPERATURE REQUIREMENT THERMAL-TIME WATER AVAILABILITY DOMESTIC SPECIES DORMANCY FORAGE GERMINATION GRASS HERBIVORE LIGHT QUALITY MORPHOLOGY PERENNIAL PLANT PLANT WATER RELATIONS SEMIARID REGION SHEEP SHRUB STEPPE TEMPERATURE EFFECT WATER AVAILABILITY PATAGONIA HORDEUM HORDEUM COMOSUM KOELERIA OVIS ARIES POACEAE |
| author |
Gundel, Pedro Emilio Irisarri, Jorge Gonzalo Nicolás Sorzoli, Nadia Soledad Mosso, Clara Emilia García Martínez, Guillermo Carlos Golluscio, Rodolfo Angel |
| author_facet |
Gundel, Pedro Emilio Irisarri, Jorge Gonzalo Nicolás Sorzoli, Nadia Soledad Mosso, Clara Emilia García Martínez, Guillermo Carlos Golluscio, Rodolfo Angel |
| author_sort |
Gundel, Pedro Emilio |
| title |
Germination requirements of two sheep - preferred grasses [Hordeum comosum and Koeleria vurilochensis var. patagonica] from semiarid Patagonian steppes |
| title_short |
Germination requirements of two sheep - preferred grasses [Hordeum comosum and Koeleria vurilochensis var. patagonica] from semiarid Patagonian steppes |
| title_full |
Germination requirements of two sheep - preferred grasses [Hordeum comosum and Koeleria vurilochensis var. patagonica] from semiarid Patagonian steppes |
| title_fullStr |
Germination requirements of two sheep - preferred grasses [Hordeum comosum and Koeleria vurilochensis var. patagonica] from semiarid Patagonian steppes |
| title_full_unstemmed |
Germination requirements of two sheep - preferred grasses [Hordeum comosum and Koeleria vurilochensis var. patagonica] from semiarid Patagonian steppes |
| title_sort |
germination requirements of two sheep - preferred grasses [hordeum comosum and koeleria vurilochensis var. patagonica] from semiarid patagonian steppes |
| url |
http://ceiba.agro.uba.ar/cgi-bin/koha/opac-detail.pl?biblionumber=46614 |
| work_keys_str_mv |
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| _version_ |
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