The effects of submergence on anatomical, morphological and biomass allocation responses of tropical grasses Chloris gayana and Panicum coloratum at seedling stage

Submergence is a major factor affecting seedling recruitment in lowland grassland ecosystems. Our aim was to evaluate the tolerance to increasing flooding intensity of the seedlings of tropical grasses Chloris gayana K. and Panicum coloratum L., whose use as a forage species is increasing in humid grasslands. For this purpose, 2-week-old seedlings of C. gayana and P. coloratum were subjected to control, partial submergence [PS] and complete submergence [CS] in clear water for 14 days and allowed to grow for a subsequent 12-day period to assess their recovery. The following responses were assessed: generation of root aerenchyma, morphological changes and emergence from water, biomass allocation in relation to plant size, and biomass accumulation. Results showed that constitutive root aerenchyma was high in both species. Under PS and CS, root aerenchyma increased by up to 50-55 percent in C. gayana and up to 40-48 percent in P. coloratum. Under PS, the increase in seedling height for both species was the same as for controls. Under CS, C. gayana further increased its height and emerged more quickly from water; P. coloratum was not able to increase its height, and therefore the seedlings always remained underwater. The escape-from-water response of C. gayana was associated with preferential biomass allocation towards shoots and with a marked lengthening of leaf blades. By contrast, there was no change in allocation in P. coloratum, and its leaves were shorter under CS. The final biomass of C. gayana under CS was similar to that under PS, and equivalent to 54 percent of its controls. In P. coloratum, biomass under PS and CS were 64 and 21 percent of its controls [respectively], which indicates that injury caused by CS persisted during the post-submergence period. In conclusion, both species are tolerant to PS at the seedling stage. However, when flood depth increases by submerging the seedlings, C. gayana is able to escape from water while P. coloratum is not, thus strongly affecting its recovery. Therefore, C. gayana appears to be a more promising species for cultivation in lowland grasslands prone to flooding of unpredictable intensity.

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Bibliographic Details
Main Authors: Imaz, José Augusto, Giménez, Daniel Omar, Grimoldi, Agustín Alberto, Striker, Gustavo Gabriel
Format: Texto biblioteca
Language:eng
Subjects:ALLOMETRY, CHLORIS GAYANA, PANICUM COLORATUM, ROOT AERENCHYMA, SEEDLING HEIGHT, SUBMERGENCE, ANATOMY, BIOMASS ALLOCATION, CULTIVATION, FLOODING, FORAGE, GRASS, GRASSLAND, HEIGHT DETERMINATION, INJURY, MORPHOLOGY, SEEDLING EMERGENCE, SHOOT, TOLERANCE,
Online Access:http://ceiba.agro.uba.ar/cgi-bin/koha/opac-detail.pl?biblionumber=46771
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id KOHA-OAI-AGRO:46771
record_format koha
institution UBA FA
collection Koha
country Argentina
countrycode AR
component Bibliográfico
access En linea
En linea
databasecode cat-ceiba
tag biblioteca
region America del Sur
libraryname Biblioteca Central FAUBA
language eng
topic ALLOMETRY
CHLORIS GAYANA
PANICUM COLORATUM
ROOT AERENCHYMA
SEEDLING HEIGHT
SUBMERGENCE
ANATOMY
BIOMASS ALLOCATION
CULTIVATION
FLOODING
FORAGE
GRASS
GRASSLAND
HEIGHT DETERMINATION
INJURY
MORPHOLOGY
SEEDLING EMERGENCE
SHOOT
TOLERANCE
ALLOMETRY
CHLORIS GAYANA
PANICUM COLORATUM
ROOT AERENCHYMA
SEEDLING HEIGHT
SUBMERGENCE
ANATOMY
BIOMASS ALLOCATION
CULTIVATION
FLOODING
FORAGE
GRASS
GRASSLAND
HEIGHT DETERMINATION
INJURY
MORPHOLOGY
SEEDLING EMERGENCE
SHOOT
TOLERANCE
spellingShingle ALLOMETRY
CHLORIS GAYANA
PANICUM COLORATUM
ROOT AERENCHYMA
SEEDLING HEIGHT
SUBMERGENCE
ANATOMY
BIOMASS ALLOCATION
CULTIVATION
FLOODING
FORAGE
GRASS
GRASSLAND
HEIGHT DETERMINATION
INJURY
MORPHOLOGY
SEEDLING EMERGENCE
SHOOT
TOLERANCE
ALLOMETRY
CHLORIS GAYANA
PANICUM COLORATUM
ROOT AERENCHYMA
SEEDLING HEIGHT
SUBMERGENCE
ANATOMY
BIOMASS ALLOCATION
CULTIVATION
FLOODING
FORAGE
GRASS
GRASSLAND
HEIGHT DETERMINATION
INJURY
MORPHOLOGY
SEEDLING EMERGENCE
SHOOT
TOLERANCE
Imaz, José Augusto
Giménez, Daniel Omar
Grimoldi, Agustín Alberto
Striker, Gustavo Gabriel
The effects of submergence on anatomical, morphological and biomass allocation responses of tropical grasses Chloris gayana and Panicum coloratum at seedling stage
description Submergence is a major factor affecting seedling recruitment in lowland grassland ecosystems. Our aim was to evaluate the tolerance to increasing flooding intensity of the seedlings of tropical grasses Chloris gayana K. and Panicum coloratum L., whose use as a forage species is increasing in humid grasslands. For this purpose, 2-week-old seedlings of C. gayana and P. coloratum were subjected to control, partial submergence [PS] and complete submergence [CS] in clear water for 14 days and allowed to grow for a subsequent 12-day period to assess their recovery. The following responses were assessed: generation of root aerenchyma, morphological changes and emergence from water, biomass allocation in relation to plant size, and biomass accumulation. Results showed that constitutive root aerenchyma was high in both species. Under PS and CS, root aerenchyma increased by up to 50-55 percent in C. gayana and up to 40-48 percent in P. coloratum. Under PS, the increase in seedling height for both species was the same as for controls. Under CS, C. gayana further increased its height and emerged more quickly from water; P. coloratum was not able to increase its height, and therefore the seedlings always remained underwater. The escape-from-water response of C. gayana was associated with preferential biomass allocation towards shoots and with a marked lengthening of leaf blades. By contrast, there was no change in allocation in P. coloratum, and its leaves were shorter under CS. The final biomass of C. gayana under CS was similar to that under PS, and equivalent to 54 percent of its controls. In P. coloratum, biomass under PS and CS were 64 and 21 percent of its controls [respectively], which indicates that injury caused by CS persisted during the post-submergence period. In conclusion, both species are tolerant to PS at the seedling stage. However, when flood depth increases by submerging the seedlings, C. gayana is able to escape from water while P. coloratum is not, thus strongly affecting its recovery. Therefore, C. gayana appears to be a more promising species for cultivation in lowland grasslands prone to flooding of unpredictable intensity.
format Texto
topic_facet ALLOMETRY
CHLORIS GAYANA
PANICUM COLORATUM
ROOT AERENCHYMA
SEEDLING HEIGHT
SUBMERGENCE
ANATOMY
BIOMASS ALLOCATION
CULTIVATION
FLOODING
FORAGE
GRASS
GRASSLAND
HEIGHT DETERMINATION
INJURY
MORPHOLOGY
SEEDLING EMERGENCE
SHOOT
TOLERANCE
author Imaz, José Augusto
Giménez, Daniel Omar
Grimoldi, Agustín Alberto
Striker, Gustavo Gabriel
author_facet Imaz, José Augusto
Giménez, Daniel Omar
Grimoldi, Agustín Alberto
Striker, Gustavo Gabriel
author_sort Imaz, José Augusto
title The effects of submergence on anatomical, morphological and biomass allocation responses of tropical grasses Chloris gayana and Panicum coloratum at seedling stage
title_short The effects of submergence on anatomical, morphological and biomass allocation responses of tropical grasses Chloris gayana and Panicum coloratum at seedling stage
title_full The effects of submergence on anatomical, morphological and biomass allocation responses of tropical grasses Chloris gayana and Panicum coloratum at seedling stage
title_fullStr The effects of submergence on anatomical, morphological and biomass allocation responses of tropical grasses Chloris gayana and Panicum coloratum at seedling stage
title_full_unstemmed The effects of submergence on anatomical, morphological and biomass allocation responses of tropical grasses Chloris gayana and Panicum coloratum at seedling stage
title_sort effects of submergence on anatomical, morphological and biomass allocation responses of tropical grasses chloris gayana and panicum coloratum at seedling stage
url http://ceiba.agro.uba.ar/cgi-bin/koha/opac-detail.pl?biblionumber=46771
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spelling KOHA-OAI-AGRO:467712022-08-11T12:11:34Zhttp://ceiba.agro.uba.ar/cgi-bin/koha/opac-detail.pl?biblionumber=46771AAGThe effects of submergence on anatomical, morphological and biomass allocation responses of tropical grasses Chloris gayana and Panicum coloratum at seedling stageImaz, José AugustoGiménez, Daniel OmarGrimoldi, Agustín AlbertoStriker, Gustavo Gabrieltextengapplication/pdfSubmergence is a major factor affecting seedling recruitment in lowland grassland ecosystems. Our aim was to evaluate the tolerance to increasing flooding intensity of the seedlings of tropical grasses Chloris gayana K. and Panicum coloratum L., whose use as a forage species is increasing in humid grasslands. For this purpose, 2-week-old seedlings of C. gayana and P. coloratum were subjected to control, partial submergence [PS] and complete submergence [CS] in clear water for 14 days and allowed to grow for a subsequent 12-day period to assess their recovery. The following responses were assessed: generation of root aerenchyma, morphological changes and emergence from water, biomass allocation in relation to plant size, and biomass accumulation. Results showed that constitutive root aerenchyma was high in both species. Under PS and CS, root aerenchyma increased by up to 50-55 percent in C. gayana and up to 40-48 percent in P. coloratum. Under PS, the increase in seedling height for both species was the same as for controls. Under CS, C. gayana further increased its height and emerged more quickly from water; P. coloratum was not able to increase its height, and therefore the seedlings always remained underwater. The escape-from-water response of C. gayana was associated with preferential biomass allocation towards shoots and with a marked lengthening of leaf blades. By contrast, there was no change in allocation in P. coloratum, and its leaves were shorter under CS. The final biomass of C. gayana under CS was similar to that under PS, and equivalent to 54 percent of its controls. In P. coloratum, biomass under PS and CS were 64 and 21 percent of its controls [respectively], which indicates that injury caused by CS persisted during the post-submergence period. In conclusion, both species are tolerant to PS at the seedling stage. However, when flood depth increases by submerging the seedlings, C. gayana is able to escape from water while P. coloratum is not, thus strongly affecting its recovery. Therefore, C. gayana appears to be a more promising species for cultivation in lowland grasslands prone to flooding of unpredictable intensity.Submergence is a major factor affecting seedling recruitment in lowland grassland ecosystems. Our aim was to evaluate the tolerance to increasing flooding intensity of the seedlings of tropical grasses Chloris gayana K. and Panicum coloratum L., whose use as a forage species is increasing in humid grasslands. For this purpose, 2-week-old seedlings of C. gayana and P. coloratum were subjected to control, partial submergence [PS] and complete submergence [CS] in clear water for 14 days and allowed to grow for a subsequent 12-day period to assess their recovery. The following responses were assessed: generation of root aerenchyma, morphological changes and emergence from water, biomass allocation in relation to plant size, and biomass accumulation. Results showed that constitutive root aerenchyma was high in both species. Under PS and CS, root aerenchyma increased by up to 50-55 percent in C. gayana and up to 40-48 percent in P. coloratum. Under PS, the increase in seedling height for both species was the same as for controls. Under CS, C. gayana further increased its height and emerged more quickly from water; P. coloratum was not able to increase its height, and therefore the seedlings always remained underwater. The escape-from-water response of C. gayana was associated with preferential biomass allocation towards shoots and with a marked lengthening of leaf blades. By contrast, there was no change in allocation in P. coloratum, and its leaves were shorter under CS. The final biomass of C. gayana under CS was similar to that under PS, and equivalent to 54 percent of its controls. In P. coloratum, biomass under PS and CS were 64 and 21 percent of its controls [respectively], which indicates that injury caused by CS persisted during the post-submergence period. In conclusion, both species are tolerant to PS at the seedling stage. However, when flood depth increases by submerging the seedlings, C. gayana is able to escape from water while P. coloratum is not, thus strongly affecting its recovery. Therefore, C. gayana appears to be a more promising species for cultivation in lowland grasslands prone to flooding of unpredictable intensity.ALLOMETRYCHLORIS GAYANAPANICUM COLORATUMROOT AERENCHYMASEEDLING HEIGHTSUBMERGENCEANATOMYBIOMASS ALLOCATIONCULTIVATIONFLOODINGFORAGEGRASSGRASSLANDHEIGHT DETERMINATIONINJURYMORPHOLOGYSEEDLING EMERGENCESHOOTTOLERANCECrop and Pasture Science