Drought avoidance and phenotypic flexibility of sweet potato (Ipomoea batatas (L.) Lam.) under water Sarcity conditions
Sweet potato (Ipomoea batatas (L.) Lam.)is an important staple food in several regions of the world. Water scarcity is the most devastating abiotic stress, with a great impact on crop productivity, food security, and subsistence. Drought restricts the nutrient intake and transport into the plant. Tolerant crops have morphological mechanisms of drought avoidance and/or phenotypic flexibility, showing also good water and nutrient efficiency. However, that information is scarce for sweet potato, which is usually based on physiological traits of plant productivity. Here, we show the physiological responses of eight sweet potato accessions subjected to a 3 months' drought period, by recording their differences for nutrient and leaf chlorophyll content, biomass and stress level. Our results showed that the differences in water use efficiency (WUE, +68.1%), chlorophyll content index (CCI,-5.3%), total plant biomass (TPB, -55.4%), nutrient efficiency (NER, +38.1%) and nutrient harvest index (NHI, +2.9%) where significantly correlated with the water regime. The water shortage led to a drought avoidance response, with TPB loss in all accessions. Distinct phenotypic flexibility responses were also recorded and explained by the root:shoot ratio (R:S) and stress index (SI) variation of the storage root and shoot growth. This information could be relevant for the development of sweet potato breeding programs, adapting this crop to climate change.
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Subjects: | F30 - Génétique et amélioration des plantes, F60 - Physiologie et biochimie végétale, P40 - Météorologie et climatologie, F50 - Anatomie et morphologie des plantes, Ipomoea batatas, résistance à la sécheresse, stress dû à la sécheresse, phénotype, adaptation aux changements climatiques, http://aims.fao.org/aos/agrovoc/c_3937, http://aims.fao.org/aos/agrovoc/c_2392, http://aims.fao.org/aos/agrovoc/c_24993, http://aims.fao.org/aos/agrovoc/c_5776, http://aims.fao.org/aos/agrovoc/c_1374567058134, |
Online Access: | http://agritrop.cirad.fr/594086/ http://agritrop.cirad.fr/594086/7/594086.pdf |
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dig-cirad-fr-5940862024-01-29T02:24:25Z http://agritrop.cirad.fr/594086/ http://agritrop.cirad.fr/594086/ Drought avoidance and phenotypic flexibility of sweet potato (Ipomoea batatas (L.) Lam.) under water Sarcity conditions. Gouveia Carla S.S., Ganança José F.T., Nóbrega Humberto G.M., de Freitas José G.R., Lebot Vincent, Pinheiro de Carvalho Miguel A.A.. 2019. Notulae Botanicae Horti Agrobotanici Cluj-Napoca, 47 (4) : 1037-1046.https://doi.org/10.15835/nbha47411633 <https://doi.org/10.15835/nbha47411633> Drought avoidance and phenotypic flexibility of sweet potato (Ipomoea batatas (L.) Lam.) under water Sarcity conditions Gouveia, Carla S.S. Ganança, José F.T. Nóbrega, Humberto G.M. de Freitas, José G.R. Lebot, Vincent Pinheiro de Carvalho, Miguel A.A. eng 2019 Notulae Botanicae Horti Agrobotanici Cluj-Napoca F30 - Génétique et amélioration des plantes F60 - Physiologie et biochimie végétale P40 - Météorologie et climatologie F50 - Anatomie et morphologie des plantes Ipomoea batatas résistance à la sécheresse stress dû à la sécheresse phénotype adaptation aux changements climatiques http://aims.fao.org/aos/agrovoc/c_3937 http://aims.fao.org/aos/agrovoc/c_2392 http://aims.fao.org/aos/agrovoc/c_24993 http://aims.fao.org/aos/agrovoc/c_5776 http://aims.fao.org/aos/agrovoc/c_1374567058134 Sweet potato (Ipomoea batatas (L.) Lam.)is an important staple food in several regions of the world. Water scarcity is the most devastating abiotic stress, with a great impact on crop productivity, food security, and subsistence. Drought restricts the nutrient intake and transport into the plant. Tolerant crops have morphological mechanisms of drought avoidance and/or phenotypic flexibility, showing also good water and nutrient efficiency. However, that information is scarce for sweet potato, which is usually based on physiological traits of plant productivity. Here, we show the physiological responses of eight sweet potato accessions subjected to a 3 months' drought period, by recording their differences for nutrient and leaf chlorophyll content, biomass and stress level. Our results showed that the differences in water use efficiency (WUE, +68.1%), chlorophyll content index (CCI,-5.3%), total plant biomass (TPB, -55.4%), nutrient efficiency (NER, +38.1%) and nutrient harvest index (NHI, +2.9%) where significantly correlated with the water regime. The water shortage led to a drought avoidance response, with TPB loss in all accessions. Distinct phenotypic flexibility responses were also recorded and explained by the root:shoot ratio (R:S) and stress index (SI) variation of the storage root and shoot growth. This information could be relevant for the development of sweet potato breeding programs, adapting this crop to climate change. article info:eu-repo/semantics/article Journal Article info:eu-repo/semantics/publishedVersion http://agritrop.cirad.fr/594086/7/594086.pdf text cc_by info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by/4.0/ https://doi.org/10.15835/nbha47411633 10.15835/nbha47411633 info:eu-repo/semantics/altIdentifier/doi/10.15835/nbha47411633 info:eu-repo/semantics/altIdentifier/purl/https://doi.org/10.15835/nbha47411633 |
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F30 - Génétique et amélioration des plantes F60 - Physiologie et biochimie végétale P40 - Météorologie et climatologie F50 - Anatomie et morphologie des plantes Ipomoea batatas résistance à la sécheresse stress dû à la sécheresse phénotype adaptation aux changements climatiques http://aims.fao.org/aos/agrovoc/c_3937 http://aims.fao.org/aos/agrovoc/c_2392 http://aims.fao.org/aos/agrovoc/c_24993 http://aims.fao.org/aos/agrovoc/c_5776 http://aims.fao.org/aos/agrovoc/c_1374567058134 F30 - Génétique et amélioration des plantes F60 - Physiologie et biochimie végétale P40 - Météorologie et climatologie F50 - Anatomie et morphologie des plantes Ipomoea batatas résistance à la sécheresse stress dû à la sécheresse phénotype adaptation aux changements climatiques http://aims.fao.org/aos/agrovoc/c_3937 http://aims.fao.org/aos/agrovoc/c_2392 http://aims.fao.org/aos/agrovoc/c_24993 http://aims.fao.org/aos/agrovoc/c_5776 http://aims.fao.org/aos/agrovoc/c_1374567058134 |
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F30 - Génétique et amélioration des plantes F60 - Physiologie et biochimie végétale P40 - Météorologie et climatologie F50 - Anatomie et morphologie des plantes Ipomoea batatas résistance à la sécheresse stress dû à la sécheresse phénotype adaptation aux changements climatiques http://aims.fao.org/aos/agrovoc/c_3937 http://aims.fao.org/aos/agrovoc/c_2392 http://aims.fao.org/aos/agrovoc/c_24993 http://aims.fao.org/aos/agrovoc/c_5776 http://aims.fao.org/aos/agrovoc/c_1374567058134 F30 - Génétique et amélioration des plantes F60 - Physiologie et biochimie végétale P40 - Météorologie et climatologie F50 - Anatomie et morphologie des plantes Ipomoea batatas résistance à la sécheresse stress dû à la sécheresse phénotype adaptation aux changements climatiques http://aims.fao.org/aos/agrovoc/c_3937 http://aims.fao.org/aos/agrovoc/c_2392 http://aims.fao.org/aos/agrovoc/c_24993 http://aims.fao.org/aos/agrovoc/c_5776 http://aims.fao.org/aos/agrovoc/c_1374567058134 Gouveia, Carla S.S. Ganança, José F.T. Nóbrega, Humberto G.M. de Freitas, José G.R. Lebot, Vincent Pinheiro de Carvalho, Miguel A.A. Drought avoidance and phenotypic flexibility of sweet potato (Ipomoea batatas (L.) Lam.) under water Sarcity conditions |
description |
Sweet potato (Ipomoea batatas (L.) Lam.)is an important staple food in several regions of the world. Water scarcity is the most devastating abiotic stress, with a great impact on crop productivity, food security, and subsistence. Drought restricts the nutrient intake and transport into the plant. Tolerant crops have morphological mechanisms of drought avoidance and/or phenotypic flexibility, showing also good water and nutrient efficiency. However, that information is scarce for sweet potato, which is usually based on physiological traits of plant productivity. Here, we show the physiological responses of eight sweet potato accessions subjected to a 3 months' drought period, by recording their differences for nutrient and leaf chlorophyll content, biomass and stress level. Our results showed that the differences in water use efficiency (WUE, +68.1%), chlorophyll content index (CCI,-5.3%), total plant biomass (TPB, -55.4%), nutrient efficiency (NER, +38.1%) and nutrient harvest index (NHI, +2.9%) where significantly correlated with the water regime. The water shortage led to a drought avoidance response, with TPB loss in all accessions. Distinct phenotypic flexibility responses were also recorded and explained by the root:shoot ratio (R:S) and stress index (SI) variation of the storage root and shoot growth. This information could be relevant for the development of sweet potato breeding programs, adapting this crop to climate change. |
format |
article |
topic_facet |
F30 - Génétique et amélioration des plantes F60 - Physiologie et biochimie végétale P40 - Météorologie et climatologie F50 - Anatomie et morphologie des plantes Ipomoea batatas résistance à la sécheresse stress dû à la sécheresse phénotype adaptation aux changements climatiques http://aims.fao.org/aos/agrovoc/c_3937 http://aims.fao.org/aos/agrovoc/c_2392 http://aims.fao.org/aos/agrovoc/c_24993 http://aims.fao.org/aos/agrovoc/c_5776 http://aims.fao.org/aos/agrovoc/c_1374567058134 |
author |
Gouveia, Carla S.S. Ganança, José F.T. Nóbrega, Humberto G.M. de Freitas, José G.R. Lebot, Vincent Pinheiro de Carvalho, Miguel A.A. |
author_facet |
Gouveia, Carla S.S. Ganança, José F.T. Nóbrega, Humberto G.M. de Freitas, José G.R. Lebot, Vincent Pinheiro de Carvalho, Miguel A.A. |
author_sort |
Gouveia, Carla S.S. |
title |
Drought avoidance and phenotypic flexibility of sweet potato (Ipomoea batatas (L.) Lam.) under water Sarcity conditions |
title_short |
Drought avoidance and phenotypic flexibility of sweet potato (Ipomoea batatas (L.) Lam.) under water Sarcity conditions |
title_full |
Drought avoidance and phenotypic flexibility of sweet potato (Ipomoea batatas (L.) Lam.) under water Sarcity conditions |
title_fullStr |
Drought avoidance and phenotypic flexibility of sweet potato (Ipomoea batatas (L.) Lam.) under water Sarcity conditions |
title_full_unstemmed |
Drought avoidance and phenotypic flexibility of sweet potato (Ipomoea batatas (L.) Lam.) under water Sarcity conditions |
title_sort |
drought avoidance and phenotypic flexibility of sweet potato (ipomoea batatas (l.) lam.) under water sarcity conditions |
url |
http://agritrop.cirad.fr/594086/ http://agritrop.cirad.fr/594086/7/594086.pdf |
work_keys_str_mv |
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