Leaf age-structure effects on plant water use and photosynthesis of two wheat cultivars

cg.contactunknown111@unknown.comen_US
cg.contributor.centerInternational Center for Agricultural Research in the Dry Areas - ICARDAen_US
cg.contributor.centerUtrecht University - UUen_US
cg.contributor.funderInternational Center for Agricultural Research in the Dry Areas - ICARDAen_US
cg.contributor.projectCommunication and Documentation Information Services (CODIS)en_US
cg.contributor.project-lead-instituteInternational Center for Agricultural Research in the Dry Areas - ICARDAen_US
cg.identifier.doihttps://dx.doi.org/10.1111/j.1469-8137.1994.tb04017.xen_US
cg.isijournalISI Journalen_US
cg.issn0028-646Xen_US
cg.issn1469-8137en_US
cg.issue2en_US
cg.journalNew Phytologisten_US
cg.subject.agrovoctranspirationen_US
cg.subject.agrovocphotosynthesisen_US
cg.subject.agrovocWheaten_US
cg.volume128en_US
dc.contributorvan den Boogaard, Rikien_US
dc.creatorVeneklaas, Erik J.en_US
dc.date.accessioned2022-03-17T22:55:01Z
dc.date.available2022-03-17T22:55:01Z
dc.description.abstractThe wheat cultivars ‘Katya Al’ and ‘Mexipak 65’, grown in pots under field conditions in a Mediterranean climate, differed only slightly in growth and water use on a whole-plant basis, although Mexipak had a smaller leaf area. When expressed on a leaf area basis, plant biomass increase and transpiration were significantly greater in Mexipak. However, previous gas exchange measurements on the youngest fully expanded leaf showed only minor differences between the two cultivars. The hypothesis that different patterns of leaf ageing contributed to the differences in plant growth and water use was tested by combining leaf demography and gas exchange measurements. Plants were subjected to two moisture treatments: ‘well-watered’ (frequent, watering to initial soil water content) and ‘intermittent drought’ (five drying-rewatering cycles). Mexipak had, on average, older leaves than Katya in both treatments because of fast early growth, which in turn was clue to a larger area of individual leaves rather than a faster leaf appearance rate. Stomatal conductance and net photosynthetic rate were nearly the same for the two cultivars, but were considerably reduced by drought and did not fully recover after rewatering. Stomatal conductance and photosynthesis tended to decrease with ape, but effects of age or treatment or their interactions were not significant and could not explain the discrepancy between whole plant and leaf observations. One possible explanation is that age effects-do exist in leaves older than those investigated. Another explanation may be that changes in microclimatological conditions caused photosynthesis and transpiration to differ from rates measured under standard conditions.en_US
dc.identifierhttps://mel.cgiar.org/reporting/downloadmelspace/hash/c88dcbd8e4ce7b918e469b545b91663f/v/d7db85d2ed2b6aab3d932ea25df3e50cen_US
dc.identifier.citationErik J. Veneklaas, Riki van den Boogaard. (28/4/2006). Leaf age-structure effects on plant water use and photosynthesis of two wheat cultivars. New Phytologist, 128 (2), pp. 331-337.en_US
dc.identifier.statusOpen accessen_US
dc.identifier.urihttps://hdl.handle.net/20.500.11766/67201
dc.languageenen_US
dc.publisherWiley (12 months)en_US
dc.rightsCopyrighted; Non-commercial educational use onlyen_US
dc.sourceNew Phytologist;128,(2006) Pagination 331-337en_US
dc.subjecttriticum aestivum (wheat)en_US
dc.subjectleaf ageen_US
dc.titleLeaf age-structure effects on plant water use and photosynthesis of two wheat cultivarsen_US
dc.typeJournal Articleen_US
dcterms.available2006-04-28en_US
dcterms.extent331-337en_US
mel.impact-factor10.151en_US

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