Evaluating the drought endurance of landscaping ground cover plants in a roof top model

Vegetative ground covers are commonly used in urban, tropical roadside gardens. Such landscaping ground covers usually encounter extreme water-deficits and high temperatures from vehicles and urban infrastructures. However, information about the plant species that are appropriate for low maintenance...

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Main Authors: Nath Pichakum, Aussanee Pichakum
Other Authors: Kasetsart University
Format: Article
Published: 2022
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Online Access:https://repository.li.mahidol.ac.th/handle/123456789/75731
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spelling th-mahidol.757312022-08-04T14:58:42Z Evaluating the drought endurance of landscaping ground cover plants in a roof top model Nath Pichakum Aussanee Pichakum Kasetsart University Mahidol University Agricultural and Biological Sciences Vegetative ground covers are commonly used in urban, tropical roadside gardens. Such landscaping ground covers usually encounter extreme water-deficits and high temperatures from vehicles and urban infrastructures. However, information about the plant species that are appropriate for low maintenance gardens is not available, especially in tropical areas. This study aimed to investigate potential indicators for evaluating plant tolerance to water-deficit situations. A non-irri-gated rooftop model was used to test 25 commercial ground cover species in a greenhouse at Mahi-dol University, Nakhon Pathom Province, Thailand. Each of these 25 species was potted and sub-jected to one of two conditions: with or without irrigation for 7 days. Physiological responses rele-vant to plant endurance during water-deficits were monitored, including changes in leaf relative water content (RWC), percent stomatal opening, leaf surface temperature, leaf total chlorophyll con-tent, leaf greenness, maximum quantum yield, and light quantum yield. Moreover, an additional indicator of landscape utility was evaluated, where each species was judged by trained panelists for their esthetic appeal. Diverse responses were observed based on the type of physiological parameter measured, plant species, and duration of drought conditions. Water withdrawal for three days was deemed an appropriate time to determine plant tolerance to water-deficit conditions, as signs of stress were clearly observed in three parameters, i.e., changes in leaf RWC, percent stomatal open-ing, and esthetic score. Lastly, cluster analysis revealed that seven plant species were appropriate for tropical, urban ground covers, as they had high endurance under water-deficit conditions, namely, Allium schoenoprasum, Liriope muscari, Aloe sp., Sedum x rubrotinctum, Alternanthera ficoidea, Pilea libanensis and Plectranthus scutellarioides. 2022-08-04T07:58:42Z 2022-08-04T07:58:42Z 2021-02-01 Article Horticulturae. Vol.7, No.2 (2021), 1-22 10.3390/horticulturae7020031 23117524 2-s2.0-85102736885 https://repository.li.mahidol.ac.th/handle/123456789/75731 Mahidol University SCOPUS https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85102736885&origin=inward
institution Mahidol University
building Mahidol University Library
continent Asia
country Thailand
Thailand
content_provider Mahidol University Library
collection Mahidol University Institutional Repository
topic Agricultural and Biological Sciences
spellingShingle Agricultural and Biological Sciences
Nath Pichakum
Aussanee Pichakum
Evaluating the drought endurance of landscaping ground cover plants in a roof top model
description Vegetative ground covers are commonly used in urban, tropical roadside gardens. Such landscaping ground covers usually encounter extreme water-deficits and high temperatures from vehicles and urban infrastructures. However, information about the plant species that are appropriate for low maintenance gardens is not available, especially in tropical areas. This study aimed to investigate potential indicators for evaluating plant tolerance to water-deficit situations. A non-irri-gated rooftop model was used to test 25 commercial ground cover species in a greenhouse at Mahi-dol University, Nakhon Pathom Province, Thailand. Each of these 25 species was potted and sub-jected to one of two conditions: with or without irrigation for 7 days. Physiological responses rele-vant to plant endurance during water-deficits were monitored, including changes in leaf relative water content (RWC), percent stomatal opening, leaf surface temperature, leaf total chlorophyll con-tent, leaf greenness, maximum quantum yield, and light quantum yield. Moreover, an additional indicator of landscape utility was evaluated, where each species was judged by trained panelists for their esthetic appeal. Diverse responses were observed based on the type of physiological parameter measured, plant species, and duration of drought conditions. Water withdrawal for three days was deemed an appropriate time to determine plant tolerance to water-deficit conditions, as signs of stress were clearly observed in three parameters, i.e., changes in leaf RWC, percent stomatal open-ing, and esthetic score. Lastly, cluster analysis revealed that seven plant species were appropriate for tropical, urban ground covers, as they had high endurance under water-deficit conditions, namely, Allium schoenoprasum, Liriope muscari, Aloe sp., Sedum x rubrotinctum, Alternanthera ficoidea, Pilea libanensis and Plectranthus scutellarioides.
author2 Kasetsart University
author_facet Kasetsart University
Nath Pichakum
Aussanee Pichakum
format Article
author Nath Pichakum
Aussanee Pichakum
author_sort Nath Pichakum
title Evaluating the drought endurance of landscaping ground cover plants in a roof top model
title_short Evaluating the drought endurance of landscaping ground cover plants in a roof top model
title_full Evaluating the drought endurance of landscaping ground cover plants in a roof top model
title_fullStr Evaluating the drought endurance of landscaping ground cover plants in a roof top model
title_full_unstemmed Evaluating the drought endurance of landscaping ground cover plants in a roof top model
title_sort evaluating the drought endurance of landscaping ground cover plants in a roof top model
publishDate 2022
url https://repository.li.mahidol.ac.th/handle/123456789/75731
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