English
 
User Manual Privacy Policy Disclaimer Contact us
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT
  Germination in four low-varzea tree species of Central Amazonia

De Oliveira Wittmann, A., Piedade, M. T. F., Parolin, P., & Wittmann, F. (2007). Germination in four low-varzea tree species of Central Amazonia. Aquatic Botany, 86(3), 197-203. doi:10.1016/j.aquabot.2006.10.001.

Item is

Basic

show hide
Item Permalink: http://hdl.handle.net/11858/00-001M-0000-000F-D7BF-B Version Permalink: http://hdl.handle.net/11858/00-001M-0000-000F-D7C0-5
Genre: Journal Article

Files

show Files
hide Files
:
OliveiraWittmann_2007.pdf (Publisher version), 675KB
 
File Permalink:
-
Name:
OliveiraWittmann_2007.pdf
Description:
-
Visibility:
Restricted (Max Planck Institute for Evolutionary Biology, Plön; )
MIME-Type / Checksum:
application/pdf
Technical Metadata:
Copyright Date:
-
Copyright Info:
-
License:
-

Locators

show

Creators

show
hide
 Creators:
De Oliveira Wittmann, Astrid, Author
Piedade, Maria T. F.1, Author              
Parolin, Pia1, Author              
Wittmann, Florian1, Author              
Affiliations:
1Working Group Tropical Ecology, Max Planck Institute for Limnology, Max Planck Institute for Evolutionary Biology, Max Planck Society, ou_976549              

Content

show
hide
Free keywords: dispersal; buoyancy; submergence; germination; hydrochory; varzea
 Abstract: Trees of Central Amazonian white-water (varzea) forests are highly adapted to the annual inundations, which can last up to 7 months every year. Many trees synchronize fruit production to the period of highest water levels of the rivers, and hydrochory is especially common in species that colonize the low-lying flood-levels flooded for longer periods. The effect of the contact of diaspores with the river water is controversially discussed in literature. While many studies describe that flooding breaks the dormancy in seeds of many varzea tree species and is necessary for germination, other studies mention that seed buoyancy and/or submergence have negative effects on germination. Therefore, the present study was desiped in order to test experimentally how seed buoyancy and seed submergence affect germination in four varzea tree species of the low-lying flood-levels. The tested species with buoyant seeds were Salix martiana and Pseudobombax munguba, those with submerged seeds Laetia corymbulosa and Vitex cymosa. 50 seeds from each species were (a) placed in water during a period of 15 days and afterwards moved to varzea substrate, thus simulating seed buoyancy and/or submergence in the natural environment, and (b) directly placed in varzea substrate, with four repetitions, respectively. Three species showed significantly higher percentages of germination in the flooded seeds than in the non-waterlogged seeds, while fruit-fibre involved seeds of P. munguba showed an opposite trend. In L. corymbulosa, germination initiated earlier in the submerged than in the control seeds, whereas there was no difference in the start of germination between waterlogged and non-waterlogged seeds of the other species. From buoyant seeds of P munguba and S. martiana, seedlings with entirely formed cotyledons were developed while still in water. These seedlings were characterized by morphological differences in comparison to seedlings originating from non-waterlogged seeds and could not protrude the root into the soil (i.e. establish) when placed in the substrate. It is likely that the seed involving fruit-fibres contribute to long-distance dispersal in these species in the natural environment, and to stabilize seedlings when diaspores land on substrate. Concluding, contact with the river water did not disturb but on the contrary enhanced germination in the four studied species.

Details

show
hide
Language(s): eng - English
 Dates: 2007-04
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Method: -
 Identifiers: eDoc: 307695
DOI: 10.1016/j.aquabot.2006.10.001
Other: 2534/S 38680
 Degree: -

Event

show

Legal Case

show

Project information

show

Source 1

show
hide
Title: Aquatic Botany
Source Genre: Journal
 Creator(s):
Affiliations:
Publ. Info: -
Pages: - Volume / Issue: 86 (3) Sequence Number: - Start / End Page: 197 - 203 Identifier: ISSN: 0304-3770