IFEVA   02662
INSTITUTO DE INVESTIGACIONES FISIOLOGICAS Y ECOLOGICAS VINCULADAS A LA AGRICULTURA
Unidad Ejecutora - UE
artículos
Título:
Environmental control of phenological development in two Lesquerella species
Autor/es:
WINDAUER L.B., SLAFER G.A., RAVETTA D.A. AND BENECH-ARNOLD R.L
Revista:
FIELD CROPS RESEARCH
Editorial:
Elsevier
Referencias:
Lugar: Amsterdam; Año: 2006 vol. 96 p. 320 - 327
ISSN:
0378-4290
Resumen:
Lesquerella fendleri and Lesquerella mendocina are two species with potential for domestication as crops for semiarid regions.
Understanding the environmental influences on development is a critical step for the introduction of a wild species into cultivation. Under
controlled conditions these species responded differently to temperature: L. fendleri phenological approach toward flowering responded
linearly to temperature, whereas initiation of flowering in L. mendocina was relatively insensitive to temperature. L. fendleri exhibited a
quantitative response to supra-optimal temperatures (with rate of development reduced with further increases in temperature) whereas L.
mendocina showed a qualitative response, no flower development at supra-optimal temperatures. In this work undertaken in the field we
studied phenological development in L. fendleri and L. mendocina as a function of planting date, quantified the time required to reach
particular phenological stages under the various thermal environments, and compared these results with those previously obtained with
controlled conditions.We also studied the influence of photoperiod on plant phenology in field situations and through experiments done under
controlled conditions.
Development rate for both species varied with sowing date with plant cycles shorter in spring sown plants, even if measured in thermal
time. L. mendocina plants sown in late spring displayed a biennial cycle. These results are consistent with those obtained under controlled
conditions. However, cycle shortening in thermal time with delays in sowing date suggested that factors other than temperature also influenced
phenology of these two species. Further studies under controlled conditions showed that phenological development of L. fendleri plants was
also altered by photoperiod, with plants displaying a typical long-day response. At the highest temperatures used in these studies L. mendocinaand Lesquerella mendocina are two species with potential for domestication as crops for semiarid regions.
Understanding the environmental influences on development is a critical step for the introduction of a wild species into cultivation. Under
controlled conditions these species responded differently to temperature: L. fendleri phenological approach toward flowering responded
linearly to temperature, whereas initiation of flowering in L. mendocina was relatively insensitive to temperature. L. fendleri exhibited a
quantitative response to supra-optimal temperatures (with rate of development reduced with further increases in temperature) whereas L.
mendocina showed a qualitative response, no flower development at supra-optimal temperatures. In this work undertaken in the field we
studied phenological development in L. fendleri and L. mendocina as a function of planting date, quantified the time required to reach
particular phenological stages under the various thermal environments, and compared these results with those previously obtained with
controlled conditions.We also studied the influence of photoperiod on plant phenology in field situations and through experiments done under
controlled conditions.
Development rate for both species varied with sowing date with plant cycles shorter in spring sown plants, even if measured in thermal
time. L. mendocina plants sown in late spring displayed a biennial cycle. These results are consistent with those obtained under controlled
conditions. However, cycle shortening in thermal time with delays in sowing date suggested that factors other than temperature also influenced
phenology of these two species. Further studies under controlled conditions showed that phenological development of L. fendleri plants was
also altered by photoperiod, with plants displaying a typical long-day response. At the highest temperatures used in these studies L. mendocinaL. fendleri phenological approach toward flowering responded
linearly to temperature, whereas initiation of flowering in L. mendocina was relatively insensitive to temperature. L. fendleri exhibited a
quantitative response to supra-optimal temperatures (with rate of development reduced with further increases in temperature) whereas L.
mendocina showed a qualitative response, no flower development at supra-optimal temperatures. In this work undertaken in the field we
studied phenological development in L. fendleri and L. mendocina as a function of planting date, quantified the time required to reach
particular phenological stages under the various thermal environments, and compared these results with those previously obtained with
controlled conditions.We also studied the influence of photoperiod on plant phenology in field situations and through experiments done under
controlled conditions.
Development rate for both species varied with sowing date with plant cycles shorter in spring sown plants, even if measured in thermal
time. L. mendocina plants sown in late spring displayed a biennial cycle. These results are consistent with those obtained under controlled
conditions. However, cycle shortening in thermal time with delays in sowing date suggested that factors other than temperature also influenced
phenology of these two species. Further studies under controlled conditions showed that phenological development of L. fendleri plants was
also altered by photoperiod, with plants displaying a typical long-day response. At the highest temperatures used in these studies L. mendocinaL. mendocina was relatively insensitive to temperature. L. fendleri exhibited a
quantitative response to supra-optimal temperatures (with rate of development reduced with further increases in temperature) whereas L.
mendocina showed a qualitative response, no flower development at supra-optimal temperatures. In this work undertaken in the field we
studied phenological development in L. fendleri and L. mendocina as a function of planting date, quantified the time required to reach
particular phenological stages under the various thermal environments, and compared these results with those previously obtained with
controlled conditions.We also studied the influence of photoperiod on plant phenology in field situations and through experiments done under
controlled conditions.
Development rate for both species varied with sowing date with plant cycles shorter in spring sown plants, even if measured in thermal
time. L. mendocina plants sown in late spring displayed a biennial cycle. These results are consistent with those obtained under controlled
conditions. However, cycle shortening in thermal time with delays in sowing date suggested that factors other than temperature also influenced
phenology of these two species. Further studies under controlled conditions showed that phenological development of L. fendleri plants was
also altered by photoperiod, with plants displaying a typical long-day response. At the highest temperatures used in these studies L. mendocinaL.
mendocina showed a qualitative response, no flower development at supra-optimal temperatures. In this work undertaken in the field we
studied phenological development in L. fendleri and L. mendocina as a function of planting date, quantified the time required to reach
particular phenological stages under the various thermal environments, and compared these results with those previously obtained with
controlled conditions.We also studied the influence of photoperiod on plant phenology in field situations and through experiments done under
controlled conditions.
Development rate for both species varied with sowing date with plant cycles shorter in spring sown plants, even if measured in thermal
time. L. mendocina plants sown in late spring displayed a biennial cycle. These results are consistent with those obtained under controlled
conditions. However, cycle shortening in thermal time with delays in sowing date suggested that factors other than temperature also influenced
phenology of these two species. Further studies under controlled conditions showed that phenological development of L. fendleri plants was
also altered by photoperiod, with plants displaying a typical long-day response. At the highest temperatures used in these studies L. mendocinashowed a qualitative response, no flower development at supra-optimal temperatures. In this work undertaken in the field we
studied phenological development in L. fendleri and L. mendocina as a function of planting date, quantified the time required to reach
particular phenological stages under the various thermal environments, and compared these results with those previously obtained with
controlled conditions.We also studied the influence of photoperiod on plant phenology in field situations and through experiments done under
controlled conditions.
Development rate for both species varied with sowing date with plant cycles shorter in spring sown plants, even if measured in thermal
time. L. mendocina plants sown in late spring displayed a biennial cycle. These results are consistent with those obtained under controlled
conditions. However, cycle shortening in thermal time with delays in sowing date suggested that factors other than temperature also influenced
phenology of these two species. Further studies under controlled conditions showed that phenological development of L. fendleri plants was
also altered by photoperiod, with plants displaying a typical long-day response. At the highest temperatures used in these studies L. mendocinaL. fendleri and L. mendocina as a function of planting date, quantified the time required to reach
particular phenological stages under the various thermal environments, and compared these results with those previously obtained with
controlled conditions.We also studied the influence of photoperiod on plant phenology in field situations and through experiments done under
controlled conditions.
Development rate for both species varied with sowing date with plant cycles shorter in spring sown plants, even if measured in thermal
time. L. mendocina plants sown in late spring displayed a biennial cycle. These results are consistent with those obtained under controlled
conditions. However, cycle shortening in thermal time with delays in sowing date suggested that factors other than temperature also influenced
phenology of these two species. Further studies under controlled conditions showed that phenological development of L. fendleri plants was
also altered by photoperiod, with plants displaying a typical long-day response. At the highest temperatures used in these studies L. mendocinaL. mendocina plants sown in late spring displayed a biennial cycle. These results are consistent with those obtained under controlled
conditions. However, cycle shortening in thermal time with delays in sowing date suggested that factors other than temperature also influenced
phenology of these two species. Further studies under controlled conditions showed that phenological development of L. fendleri plants was
also altered by photoperiod, with plants displaying a typical long-day response. At the highest temperatures used in these studies L. mendocinaL. fendleri plants was
also altered by photoperiod, with plants displaying a typical long-day response. At the highest temperatures used in these studies L. mendocinaL. mendocina
plants did not respond to photoperiod. The possibility that incident radiation is involved in L. mendocina response to sowing date is discussed.L. mendocina response to sowing date is discussed.