2017
|
Martínez, D N; de la Barrera, E PREPRINT: Germination ecophysiology for three peri-urban ephemeral weeds Journal Article PeerJ Preprints, 5 , pp. e2950v1, 2017, ISSN: 2167-9843, (NOT Peer reviewed. This is an early communication for feedback before peer review). Abstract | Links | BibTeX | Tags: disturbance, invasive species, land-use change, reproductive ecophysiology, seed bank, temperature, urban ecology, water relations @article{Martínez2017,
title = {PREPRINT: Germination ecophysiology for three peri-urban ephemeral weeds},
author = {D. N. Martínez and E. de la Barrera},
url = {https://peerj.com/preprints/2950/},
doi = {10.7287/peerj.preprints.2950v1},
issn = { 2167-9843},
year = {2017},
date = {2017-04-27},
journal = {PeerJ Preprints},
volume = {5},
pages = {e2950v1},
abstract = {We determined the environmental requirements leading to germination by three common species found during the summer rainy season in a peri-urban site where construction of a university campus was underway. In particular, we evaluated laboratory responses to low-temperature stratification, day/night air temperature, and water potential for the native Onagraceae Lopezia racemosa and Ludwigia octovalvis, and the exotic Polygonaceae Rumex crispus. Low-temperature stratification had no effect on germination by L. racemosa, for which maximum germination averaging 88% was optimal at 25/15 and 30/20 ºC. Germination at 21 d was halved at –0.5 MPa and completely inhibited at –1.0 MPa. The seeds of L. octovalvis were also insensitive to low temperature stratification and their germination never exceeded 70%, with the two highest temperatures of 30/20 and 35/25 ºC being the optimum. For this species germination was maximal at 0.0 MPa, decreasing significantly under every treatment with a minimum germination of 21% for seeds incubated at –0.1 MPa. Germination for the exotic R. crispus was delayed by low-temperature stratification, although all of its seeds germinated regardless of the temperature or water potential treatment. While the environmental requirements for germination of ephemeral species often match the typical climate of their growing season, the differential responses found for the species considered in the present study provide some insight into the mechanisms leading to changes in species composition for communities from disturbed environments, including the displacement of native species and the proliferation of exotic, potentially invasive, plants.},
note = {NOT Peer reviewed. This is an early communication for feedback before peer review},
keywords = {disturbance, invasive species, land-use change, reproductive ecophysiology, seed bank, temperature, urban ecology, water relations},
pubstate = {published},
tppubtype = {article}
}
We determined the environmental requirements leading to germination by three common species found during the summer rainy season in a peri-urban site where construction of a university campus was underway. In particular, we evaluated laboratory responses to low-temperature stratification, day/night air temperature, and water potential for the native Onagraceae Lopezia racemosa and Ludwigia octovalvis, and the exotic Polygonaceae Rumex crispus. Low-temperature stratification had no effect on germination by L. racemosa, for which maximum germination averaging 88% was optimal at 25/15 and 30/20 ºC. Germination at 21 d was halved at –0.5 MPa and completely inhibited at –1.0 MPa. The seeds of L. octovalvis were also insensitive to low temperature stratification and their germination never exceeded 70%, with the two highest temperatures of 30/20 and 35/25 ºC being the optimum. For this species germination was maximal at 0.0 MPa, decreasing significantly under every treatment with a minimum germination of 21% for seeds incubated at –0.1 MPa. Germination for the exotic R. crispus was delayed by low-temperature stratification, although all of its seeds germinated regardless of the temperature or water potential treatment. While the environmental requirements for germination of ephemeral species often match the typical climate of their growing season, the differential responses found for the species considered in the present study provide some insight into the mechanisms leading to changes in species composition for communities from disturbed environments, including the displacement of native species and the proliferation of exotic, potentially invasive, plants. |
Inglese, P; Liguori, G; de la Barrera, E Ecophysiology and reproductive biology of cultivated cacti Book Chapter Inglese, P; Mondragón, C; Nefzaoui, A; Sáenz, C (Ed.): Chapter 4, pp. 29-41, FAO & ICARDA, 2017. Links | BibTeX | Tags: climate change, food security, fruit, gas exchange, opuntia, reproductive ecophysiology @inbook{Inglese2017,
title = {Ecophysiology and reproductive biology of cultivated cacti},
author = {P. Inglese and G. Liguori and E. de la Barrera },
editor = {P. Inglese and C. Mondragón and A. Nefzaoui and C. Sáenz},
url = {http://agro.mx/wp-content/uploads/2017/04/042-Inglese-et-al-2017-1.pdf
http://www.fao.org/publications/card/en/c/6cb6bff1-66f3-4d2e-92cc-c58130c1f9dc/},
year = {2017},
date = {2017-03-26},
pages = {29-41},
publisher = {FAO & ICARDA},
chapter = {4},
keywords = {climate change, food security, fruit, gas exchange, opuntia, reproductive ecophysiology},
pubstate = {published},
tppubtype = {inbook}
}
|
2015
|
Gudiño, W; Márquez-Guzmán, J; de la Barrera, E Structural implications for nectar secretion by floral nectaries of three columnar cacti Journal Article Maejo International Journal of Science and Technology, 9 (2), pp. 156-164, 2015. Abstract | Links | BibTeX | Tags: flower, morphology, nectar, nectary, Polaskia, reproductive ecophysiology, Stenocereus @article{Gudiño2015,
title = {Structural implications for nectar secretion by floral nectaries of three columnar cacti},
author = {W. Gudiño and J. Márquez-Guzmán and E. de la Barrera },
url = {http://agro.mx/wp-content/uploads/2015/06/30-MIJST.pdf
http://www.mijst.mju.ac.th/vol9/156-164.pdf
},
year = {2015},
date = {2015-06-06},
journal = {Maejo International Journal of Science and Technology},
volume = {9},
number = {2},
pages = {156-164},
abstract = {Floral nectaries are essential for plant reproduction. Their position and shape are
important because these factors determine the amount of nectar secreted and therefore the
pollinators that are attracted. The main objective of this study is to determine the position,
shape and macromorphology of floral nectaries for three columnar cacti, namely Polaskia
chende, P. chichipe and Stenocereus quevedonis. By means of light microscopy, scanning
electron microscopy and histochemical tests, the floral nectar-secreting structures were
investigated. Different secreting structures were found for the three species, with S.
quevedonis having the largest nectar secreting area consisting of stomates located at the base
of the stem filaments (1.9 mm2
). The nectar secretory pores of P. chichipe measured 0.93
mm2
, while the cuticular fissures of P. chende measured 0.8 mm2
. For the case of these three
species, the surface available for nectar secretion appears to determine the volume of nectar
secretion. The relationships between nectarial chamber size, total nectar volume secreted and
size of secreting structure found for the three species suggest that the surface area available is
the central influential variable that determines the volume of secreted nectar.},
keywords = {flower, morphology, nectar, nectary, Polaskia, reproductive ecophysiology, Stenocereus},
pubstate = {published},
tppubtype = {article}
}
Floral nectaries are essential for plant reproduction. Their position and shape are
important because these factors determine the amount of nectar secreted and therefore the
pollinators that are attracted. The main objective of this study is to determine the position,
shape and macromorphology of floral nectaries for three columnar cacti, namely Polaskia
chende, P. chichipe and Stenocereus quevedonis. By means of light microscopy, scanning
electron microscopy and histochemical tests, the floral nectar-secreting structures were
investigated. Different secreting structures were found for the three species, with S.
quevedonis having the largest nectar secreting area consisting of stomates located at the base
of the stem filaments (1.9 mm2
). The nectar secretory pores of P. chichipe measured 0.93
mm2
, while the cuticular fissures of P. chende measured 0.8 mm2
. For the case of these three
species, the surface available for nectar secretion appears to determine the volume of nectar
secretion. The relationships between nectarial chamber size, total nectar volume secreted and
size of secreting structure found for the three species suggest that the surface area available is
the central influential variable that determines the volume of secreted nectar. |
2009
|
de la Barrera, E; Pimienta-Barrios, E; Schondube, J E Reproductive ecophysiology Book Chapter de la Barrera, E; Smith, W K (Ed.): Perspectives in Biophysical Plant Ecophysiology: A Tribute to Park S. Nobel, pp. 301-335, Universidad Nacional Autónoma de México, 2009. Links | BibTeX | Tags: establishment, evolution, flower, fruit, nectar, pollinator, reproductive ecophysiology, seed @inbook{delaBarrera2009b,
title = {Reproductive ecophysiology},
author = {E. de la Barrera and E. Pimienta-Barrios and J. E. Schondube},
editor = {E. de la Barrera and W. K. Smith},
url = {https://books.google.com.mx/books?id=FOLucdeycDkC&lpg=PA393&ots=9pz9EVuNJz&dq=epilogue%20erick%20de%20la%20barrera%20perspectives%20biophysical%20ecophysiology&pg=PA301#v=onepage&q&f=false},
year = {2009},
date = {2009-01-01},
booktitle = {Perspectives in Biophysical Plant Ecophysiology: A Tribute to Park S. Nobel},
pages = {301-335},
publisher = {Universidad Nacional Autónoma de México},
keywords = {establishment, evolution, flower, fruit, nectar, pollinator, reproductive ecophysiology, seed},
pubstate = {published},
tppubtype = {inbook}
}
|
2007
|
Gallardo-Vásquez, J C; de la Barrera, E Environmental and ontogenetic influences on growth, photosynthesis, and survival for young pitayo (Stenocereus queretaroensis) seedlings Journal Article Journal of the Professional Association for Cactus Development, 9 , pp. 118-135, 2007. Links | BibTeX | Tags: acclimation, agroecology, domestication, growth, nurse plants, photosynthesis, pitayo, reproductive ecophysiology, seed, seedling, shade, Stenocereus @article{Gallardo-Vásquez2007,
title = {Environmental and ontogenetic influences on growth, photosynthesis, and survival for young pitayo (Stenocereus queretaroensis) seedlings},
author = {J. C. Gallardo-Vásquez and E. de la Barrera },
url = {http://www.jpacd.org/downloads/vol9/v9p118-135.pdf},
year = {2007},
date = {2007-04-04},
journal = {Journal of the Professional Association for Cactus Development},
volume = {9},
pages = {118-135},
keywords = {acclimation, agroecology, domestication, growth, nurse plants, photosynthesis, pitayo, reproductive ecophysiology, seed, seedling, shade, Stenocereus},
pubstate = {published},
tppubtype = {article}
}
|
