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Anthropogenic fires in Indonesia : a view from Sumatra
It is safe to regard all vegetation fires that occur on the main forested islands of Kalimantan, Sumatra and Irian Jaya as deliberately started by man. Accidental ignition caused by lightning strikes… Expand
Fire zones and the threat to the wetlands of Sumatra, Indonesia.
Detection of Abscisic Acid in the Xylem Sap of Willow (Salix viminalis L.) by Gas–Liquid Chromatography
THE recently characterized plant growth inhibitor, abscisic acid1,2, has been shown to occur in the phloem sap of willow by spectropolarimetry of a purified aphid honeydew extract3. The pronounced… Expand
Seed handling practices: four fast-growing hardwoods for humid tropical plantations in the eighties.
Evidence for gibberellin-like substances in phloem exudate of higher plants
SummarySamples of sieve-tube sap were obtained as honeydew from aphids feeding on three species of higher plants. The honeydew was extracted, chromatographed and tested in several bioassays for the… Expand
Auxin transport in roots
SummaryExperiments involving soluble-compound microautoradiography and girdling procedures have been carried out in an attempt to identify the tissues responsible for the acropetally polarised… Expand
Further investigations into hormone-directed transport in stems
SummaryThe effect of IAA and three synthetic auxins on the upward movement of 32P-orthophosphate and 14C-sucrose has been investigated in decapitated stems of Phaseolus vulgaris L., Pisum sativum L.,… Expand
Inhibitor content of phloem and xylem sap obtained from willow (Salix viminalis L.) entering dormancy
SummaryIt is shown that there is one growth inhibitor in the phloem sap and two in the xylem sap of willow (S. viminalis L.). The concentration of the inhibitor in the phloem sap, (+)-abscisic acid,… Expand
The interchange of 14C-kinetin and 14C-gibberellic acid between the bark and xylem of willow
SummaryConsiderable two-way interchange of label derived from 14C-GA3 and 14C-kinetin has been shown to occur between the xylem and extra-cambial tissue of Salix viminalis L. Radial translocation of… Expand