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Effect of drought stress on the physiology and early growth of seven Senegalia (Acacia) Senegal (L.) Britton provenances
Decline of Senegalia senegal ( Acacia senegal ) in its natural range has been observed and attributed mainly to harsh environmental conditions such as frequent drought occurrences. The objective of this study is to assess the effect of water stress on growth, biomass allocation and photosynthetic ca...
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Published in: | New forests 2024-09, Vol.55 (5), p.1145-1158 |
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description | Decline of
Senegalia senegal
(
Acacia senegal
) in its natural range has been observed and attributed mainly to harsh environmental conditions such as frequent drought occurrences. The objective of this study is to assess the effect of water stress on growth, biomass allocation and photosynthetic capacity in
Senegalia senegal
seedlings. Seeds were collected from seven provenances in Senegal and grown under greenhouse conditions in a randomized complete block design with 5 replications. Seedlings were subjected to three cyclic droughts by watering them when average soil moisture content dropped to 4.7%, 2.7%, and 2.1% during the first, second, and third dry down cycles, respectively. With the exception of net photosynthetic rate, stomatal conductance and transpiration at the second and third dry down cycles, no drought by provenance interaction was found for any trait measured. Ngane provenance had a lower root/shoot ratio and allometric analysis revealed that Ngane allocated less biomass to roots than shoots. Ngane developed superior growth traits and biomass production, despite similar net photosynthetic rate with other provenances before treatments started. Overall, drought stress significantly reduced biomass, stem height, diameter and leaf gas exchange. Total biomass was reduced by 28.5%, whereas root/shoot ratio was increased by 25% compared to control. Significant interaction on leaf gas exchanges at the second and third dry down cycles reveals different sensitivity levels to drought among provenances with the Ranerou provenance exhibiting no decline in leaf gas exchange. No significant difference of stomatal limitation among genotypes was found, which is indicative of the complex process of photosynthesis and the need for extended times scales for measurements to better depict physiological sensitivity of
Senegalia senegal
to drought. |
doi_str_mv | 10.1007/s11056-023-10027-5 |
format | article |
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Senegalia senegal
(
Acacia senegal
) in its natural range has been observed and attributed mainly to harsh environmental conditions such as frequent drought occurrences. The objective of this study is to assess the effect of water stress on growth, biomass allocation and photosynthetic capacity in
Senegalia senegal
seedlings. Seeds were collected from seven provenances in Senegal and grown under greenhouse conditions in a randomized complete block design with 5 replications. Seedlings were subjected to three cyclic droughts by watering them when average soil moisture content dropped to 4.7%, 2.7%, and 2.1% during the first, second, and third dry down cycles, respectively. With the exception of net photosynthetic rate, stomatal conductance and transpiration at the second and third dry down cycles, no drought by provenance interaction was found for any trait measured. Ngane provenance had a lower root/shoot ratio and allometric analysis revealed that Ngane allocated less biomass to roots than shoots. Ngane developed superior growth traits and biomass production, despite similar net photosynthetic rate with other provenances before treatments started. Overall, drought stress significantly reduced biomass, stem height, diameter and leaf gas exchange. Total biomass was reduced by 28.5%, whereas root/shoot ratio was increased by 25% compared to control. Significant interaction on leaf gas exchanges at the second and third dry down cycles reveals different sensitivity levels to drought among provenances with the Ranerou provenance exhibiting no decline in leaf gas exchange. No significant difference of stomatal limitation among genotypes was found, which is indicative of the complex process of photosynthesis and the need for extended times scales for measurements to better depict physiological sensitivity of
Senegalia senegal
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Senegalia senegal
(
Acacia senegal
) in its natural range has been observed and attributed mainly to harsh environmental conditions such as frequent drought occurrences. The objective of this study is to assess the effect of water stress on growth, biomass allocation and photosynthetic capacity in
Senegalia senegal
seedlings. Seeds were collected from seven provenances in Senegal and grown under greenhouse conditions in a randomized complete block design with 5 replications. Seedlings were subjected to three cyclic droughts by watering them when average soil moisture content dropped to 4.7%, 2.7%, and 2.1% during the first, second, and third dry down cycles, respectively. With the exception of net photosynthetic rate, stomatal conductance and transpiration at the second and third dry down cycles, no drought by provenance interaction was found for any trait measured. Ngane provenance had a lower root/shoot ratio and allometric analysis revealed that Ngane allocated less biomass to roots than shoots. Ngane developed superior growth traits and biomass production, despite similar net photosynthetic rate with other provenances before treatments started. Overall, drought stress significantly reduced biomass, stem height, diameter and leaf gas exchange. Total biomass was reduced by 28.5%, whereas root/shoot ratio was increased by 25% compared to control. Significant interaction on leaf gas exchanges at the second and third dry down cycles reveals different sensitivity levels to drought among provenances with the Ranerou provenance exhibiting no decline in leaf gas exchange. No significant difference of stomatal limitation among genotypes was found, which is indicative of the complex process of photosynthesis and the need for extended times scales for measurements to better depict physiological sensitivity of
Senegalia senegal
to drought.</description><subject>Biomass</subject><subject>Biomedical and Life Sciences</subject><subject>Cycle ratio</subject><subject>Drought</subject><subject>Environmental conditions</subject><subject>Forestry</subject><subject>Gas exchange</subject><subject>Genotypes</subject><subject>Leaves</subject><subject>Life Sciences</subject><subject>Moisture content</subject><subject>Photosynthesis</subject><subject>Physiology</subject><subject>Seedlings</subject><subject>Senegalia senegal</subject><subject>Sensitivity</subject><subject>Shoots</subject><subject>Soil moisture</subject><subject>Stomata</subject><subject>Stomatal conductance</subject><subject>Transpiration</subject><subject>Water content</subject><subject>Water stress</subject><issn>0169-4286</issn><issn>1573-5095</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2024</creationdate><recordtype>article</recordtype><recordid>eNp9kD1PwzAQhi0EEqXwB5gssbRDis-Ok3QsVfmQKjEAs-U4dpIqxMV2gfx7EgJiYzrd6Xmfk16ELoEsgJD02gMQnkSEsqjfaRrxIzQBnrKIkyU_RhMCyTKKaZacojPvd4QMGJugz40xWgVsDS6cPZRVwD447T22LQ6Vxvuq87VtbNlh2RZYS9d0uHT2I1RDyOt33eIn3epSNrXEs5WSqpbz3xOebRdzfOPqEHrh3tkel63S_hydGNl4ffEzp-jldvO8vo-2j3cP69U2UixhIUqkyUFzyhRlJAegaZxnKfA4BUohYdqkGeVKUSgyJk0cm9jwAiBnjBqScTZFV6O3__120D6InT24tn8pGJDBkS7jnqIjpZz13mkj9q5-la4TQMTQsBgbFn1p4rthMajZGPI93Jba_an_SX0B76V9Lw</recordid><startdate>20240901</startdate><enddate>20240901</enddate><creator>Sarr, Mame S.</creator><creator>Seiler, John R.</creator><creator>Sullivan, Jay</creator><general>Springer Netherlands</general><general>Springer Nature B.V</general><scope>C6C</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7SN</scope><scope>7ST</scope><scope>7T7</scope><scope>8FD</scope><scope>C1K</scope><scope>FR3</scope><scope>P64</scope><scope>SOI</scope></search><sort><creationdate>20240901</creationdate><title>Effect of drought stress on the physiology and early growth of seven Senegalia (Acacia) Senegal (L.) Britton provenances</title><author>Sarr, Mame S. ; Seiler, John R. ; Sullivan, Jay</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c363t-6afb1e523c230b11274b871547122163ef7825cc21d83af44f4f5d11b332f0853</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2024</creationdate><topic>Biomass</topic><topic>Biomedical and Life Sciences</topic><topic>Cycle ratio</topic><topic>Drought</topic><topic>Environmental conditions</topic><topic>Forestry</topic><topic>Gas exchange</topic><topic>Genotypes</topic><topic>Leaves</topic><topic>Life Sciences</topic><topic>Moisture content</topic><topic>Photosynthesis</topic><topic>Physiology</topic><topic>Seedlings</topic><topic>Senegalia senegal</topic><topic>Sensitivity</topic><topic>Shoots</topic><topic>Soil moisture</topic><topic>Stomata</topic><topic>Stomatal conductance</topic><topic>Transpiration</topic><topic>Water content</topic><topic>Water stress</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Sarr, Mame S.</creatorcontrib><creatorcontrib>Seiler, John R.</creatorcontrib><creatorcontrib>Sullivan, Jay</creatorcontrib><collection>SpringerOpen</collection><collection>CrossRef</collection><collection>Ecology Abstracts</collection><collection>Environment Abstracts</collection><collection>Industrial and Applied Microbiology Abstracts (Microbiology A)</collection><collection>Technology Research Database</collection><collection>Environmental Sciences and Pollution Management</collection><collection>Engineering Research Database</collection><collection>Biotechnology and BioEngineering Abstracts</collection><collection>Environment Abstracts</collection><jtitle>New forests</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Sarr, Mame S.</au><au>Seiler, John R.</au><au>Sullivan, Jay</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Effect of drought stress on the physiology and early growth of seven Senegalia (Acacia) Senegal (L.) Britton provenances</atitle><jtitle>New forests</jtitle><stitle>New Forests</stitle><date>2024-09-01</date><risdate>2024</risdate><volume>55</volume><issue>5</issue><spage>1145</spage><epage>1158</epage><pages>1145-1158</pages><issn>0169-4286</issn><eissn>1573-5095</eissn><abstract>Decline of
Senegalia senegal
(
Acacia senegal
) in its natural range has been observed and attributed mainly to harsh environmental conditions such as frequent drought occurrences. The objective of this study is to assess the effect of water stress on growth, biomass allocation and photosynthetic capacity in
Senegalia senegal
seedlings. Seeds were collected from seven provenances in Senegal and grown under greenhouse conditions in a randomized complete block design with 5 replications. Seedlings were subjected to three cyclic droughts by watering them when average soil moisture content dropped to 4.7%, 2.7%, and 2.1% during the first, second, and third dry down cycles, respectively. With the exception of net photosynthetic rate, stomatal conductance and transpiration at the second and third dry down cycles, no drought by provenance interaction was found for any trait measured. Ngane provenance had a lower root/shoot ratio and allometric analysis revealed that Ngane allocated less biomass to roots than shoots. Ngane developed superior growth traits and biomass production, despite similar net photosynthetic rate with other provenances before treatments started. Overall, drought stress significantly reduced biomass, stem height, diameter and leaf gas exchange. Total biomass was reduced by 28.5%, whereas root/shoot ratio was increased by 25% compared to control. Significant interaction on leaf gas exchanges at the second and third dry down cycles reveals different sensitivity levels to drought among provenances with the Ranerou provenance exhibiting no decline in leaf gas exchange. No significant difference of stomatal limitation among genotypes was found, which is indicative of the complex process of photosynthesis and the need for extended times scales for measurements to better depict physiological sensitivity of
Senegalia senegal
to drought.</abstract><cop>Dordrecht</cop><pub>Springer Netherlands</pub><doi>10.1007/s11056-023-10027-5</doi><tpages>14</tpages><oa>free_for_read</oa></addata></record> |
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subjects | Biomass Biomedical and Life Sciences Cycle ratio Drought Environmental conditions Forestry Gas exchange Genotypes Leaves Life Sciences Moisture content Photosynthesis Physiology Seedlings Senegalia senegal Sensitivity Shoots Soil moisture Stomata Stomatal conductance Transpiration Water content Water stress |
title | Effect of drought stress on the physiology and early growth of seven Senegalia (Acacia) Senegal (L.) Britton provenances |
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