Osmotic adjustment, stomata morphology and function show contrasting responses to water stress in mesic and hydric grasses under elevated CO2 concentration

Simple item page
cg.contributor.affiliationInternational Center for Tropical Agriculture
cg.creator.identifierSolomon Mwendia: 0000-0002-3203-8770
cg.identifier.doihttps://doi.org/10.32615/ps.2019.016
cg.isijournalISI Journal
cg.issn0300-3604
cg.issue1
cg.journalPhotosynthetica
cg.reviewStatusPeer Review
cg.subject.ciatTROPICAL FORAGES
cg.subject.ciatWATER
cg.subject.ilriFORAGES
cg.volume57
dc.contributor.authorMwendia, Solomon W.
dc.contributor.authorYanusa, B.M.
dc.contributor.authorWhalley, R.D.B
dc.contributor.authorBruhl, J.J.
dc.date.accessioned2019-02-07T15:05:30Zen
dc.date.available2019-02-07T15:05:30Zen
dc.identifier.urihttps://hdl.handle.net/10568/99321
dc.titleOsmotic adjustment, stomata morphology and function show contrasting responses to water stress in mesic and hydric grasses under elevated CO2 concentrationen
dcterms.abstractThe physiological response of two species of grasses with C3 and C4 mechanisms syndromes, Napier grass (Pennisetum purpureum Schumach × Pennisetum glaucum (L.) R. Br) and hydric common reed grass (Phragmites australis (Cav.) Trin. Ex Steud) was examined under ambient (aCO2) and elevated CO2 (eCO2), in combination with water and temperature stress treatments. Under eCO2 and subjected to water and temperature stress, the Napier grass maintained higher daytime leaf water potential (LWP) by reducing transpiration (E) and executing larger osmotic adjustment (OA) at an average of 0.85 MPa compared with 0.42 MPa for common reed; carbon assimilation (PN) was thus higher for the Napier grass. Under aCO2 and low temperature, water stress induced no significant differences in OA between the grasses, but Napier grass still had higher PN than that of common reed. Recovery in LWP and PN following re-watering of water-stressed plants was more rapid in Napier grass than that in the common reed; the former had also higher water-use efficiency due to its low specific water use (water use/leaf area) that was just a fraction (less than 6%) that of the common reed. Exposure of common reed to eCO2 reduced stomata number, but increased it in the Napier grass, especially when subjected to water stress and high temperature. Exposure to eCO2 enhanced OA capacity and E control in Napier grass resulting in superior physiological profile over the common reed subjected to water and heat stress.en
dcterms.accessRightsOpen Access
dcterms.bibliographicCitationMwendia, Solomon; Yanusa, B.M.; Whalley, R.D.B & Bruhl, J.J. (2019). Osmotic adjustment, stomata morphology and function show contrasting responses to water stress in mesic and hydric grasses under elevated CO2 concentration. Photosynthetica: international journal for photosynthesis research , 57(1): 121-131en
dcterms.extent121-131
dcterms.issued2019-01-30
dcterms.languageen
dcterms.licenseCC-BY-NC-ND-4.0
dcterms.publisherInstitute of Experimental Botany
dcterms.subjectfeed cropsen
dcterms.subjectheat stressen
dcterms.subjectleaf water potentialen
dcterms.subjectpotencial hídricoen
dcterms.subjectestrés térmicoen
dcterms.subjectwater use efficiencyen
dcterms.subjecteficacia en el uso del aguaen
dcterms.typeJournal Article

Files

License bundle

Now showing 1 - 1 of 1
Thumbnail Image
Name:
license.txt
Size:
1.75 KB
Format:
Item-specific license agreed upon to submission
Description:
Download

Collections

CIAT Articles in Journals
CIAT Agrobiodiversity