Linked Life Data

19050062

Source:http://linkedlifedata.com/resource/pubmed/id/19050062

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
2
pubmed:dateCreated
2009-3-6
pubmed:abstractText
Sugarcane (Saccharum spp. hybrids) accumulates sucrose to high concentrations and, as a result, has been the focus of extensive research into the biochemistry and physiology of sucrose accumulation. Despite this, the relationship between source leaf photosynthetic activity and sucrose accumulation in the culm sink is not well understood. The observations that photosynthetic activity declines during culm maturation in commercial cultivars and that high-sucrose-accumulating noble ancestral genotypes (Saccharum officinarum L.) photosynthesize at rates two-thirds of those of low-sucrose ancestors (Saccharum spontaneum L.) indicate that source-sink communication may play a pivotal role in determining sucrose yield. Although maturation of the culm results in a decreased demand for sucrose, recent evidence from partial leaf shading, defoliation, and transgenic studies indicates that sugarcane cultivars are capable of further increases in sugar content. Furthermore, sugarcane leaves appear to retain the capacity to increase the supply of assimilate to culm tissues under conditions of increased assimilate demand. The relationship between source and sink tissues in sugarcane should be viewed within a supply-demand paradigm; an often neglected conceptual approach in the study of this crop. Uncoupling of the signalling pathways that mediate negative feedback between source and sink tissues may result in improved leaf assimilation rates and, consequently, lead to increased sugarcane sucrose yields.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:issn
1460-2431
pubmed:author
pubmed:issnType
Electronic
pubmed:volume
60
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
357-64
pubmed:meshHeading
pubmed:year
2009
pubmed:articleTitle
Supply and demand: sink regulation of sugar accumulation in sugarcane.
pubmed:affiliation
South African Sugarcane Research Institute, Crop Biology Resource Centre, Private Bag X02, Mt Edgecombe 4300, South Africa. alistair.mccormick@plants.ox.ac.uk
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't