Influence of water stress on flowering and seed production of Macroptilium atropurpureum cv. siratro

Kowithayakorn L. and Humphreys L.R. (1987) Influence of water stress on flowering and seed production of Macroptilium atropurpureum cv. siratro. Annals of Botany, 59 5: 551-557.

Author Kowithayakorn L.
Humphreys L.R.
Title Influence of water stress on flowering and seed production of Macroptilium atropurpureum cv. siratro
Journal name Annals of Botany   Check publisher's open access policy
ISSN 0305-7364
Publication date 1987-01-01
Sub-type Article (original research)
Volume 59
Issue 5
Start page 551
End page 557
Total pages 7
Subject 1804 Statistics, Probability and Uncertainty
2604 Applied Mathematics
3207 Social Psychology
3203 Clinical Psychology
2743 Reproductive Medicine
1110 Nursing
Abstract Macroptilium atropurpureum cv. Siratro was grown in large soil beds with a constant water table below, developing a dawn leaf watêr potential of --0.25 MPa. Water stresses equivalent to -0.7 or -1.0 MPa were developed over 14 d, causing reduced stem and bud elongation, leaf expansion, and bud differentiation and survival. Apex size, the proportion of buds which were floral or vegetative, the early phases of floral initiation, and seed formation on advanced inflorescences were little affected during the water deficit period.Upon rewatering previously stressed plants showed increases relative to control plants in the rates of shoot appearance, leaf expansion and new node appearance. The ratio of buds becoming floral was independent of watering treatment, and the enhanced rate of floral bud production in the previously-stressed treatments was due to higher rates of total bud differentiation which persisted for up to six weeks after rewatering. Survival of floral buds was reduced by previous stress, but number of flowers per inflorescence, pod setting, seed number per pod and 100-seed weight were independent of treatment. Seed production was controlled by inflorescence density. Rate of seed production was independent of treatment during water deficit and four weeks subsequently, and was then enhanced by 46 and 54 per cent relative to the control in the -0.7 and -1.0 MPa treatments respectively.
Keyword Bud development
Floral initiation
Flowering
Macroptilium atropurpureum
Seed production
Siratro
Water stress
Q-Index Code C1
Institutional Status Unknown

Document type: Journal Article
Sub-type: Article (original research)
Collection: Scopus Import - Archived
 
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Created: Tue, 06 Sep 2016, 11:30:28 EST by System User