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Variation of phloem turgor pressure in Hevea brasiliensis: An implication for latex yield and tapping system optimization

An, Feng, Lin, Weifu, Cahill, David, Rookes, James and Kong, Lingxue 2014, Variation of phloem turgor pressure in Hevea brasiliensis: An implication for latex yield and tapping system optimization, Industrial crops and products, vol. 58, pp. 182-187, doi: 10.1016/j.indcrop.2014.04.016.

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Title Variation of phloem turgor pressure in Hevea brasiliensis: An implication for latex yield and tapping system optimization
Formatted title  Variation of phloem turgor pressure in Hevea brasiliensis: an implication for latex yield and tapping system optimization
Author(s) An, Feng
Lin, Weifu
Cahill, DavidORCID iD for Cahill, David
Rookes, JamesORCID iD for Rookes, James
Kong, LingxueORCID iD for Kong, Lingxue
Journal name Industrial crops and products
Volume number 58
Start page 182
End page 187
Total pages 6
Publisher Elsevier BV
Place of publication Amsterdam, Netherlands
Publication date 2014-07
ISSN 0926-6690
Keyword(s) Ethrel stimulation
Phloem turgor pressure
Rubber tree (Hevea brasiliensis)
Tapping system
Yield potential
Science & Technology
Life Sciences & Biomedicine
Agricultural Engineering
Summary Phloem turgor pressure (PTP) is the initial driving force for latex flow after a rubber tree is tapped and therefore plays an important role in rubber tree latex production. Variation in PTP with rubber tree clone, age, yield potential and commonly used Ethrel (an ethylene releaser) stimulation have, however, not been comprehensively studied to date. The aim of this study was to investigate these relations and examine whether PTP can be used as an index for rubber tree clone assessment and tapping system optimization. The results showed that: (1) the daily change of PTP in the foliation season suggests that a high PTP can ensure a high latex yield and tapping could be moved forward to midnight or earlier in the night; (2) the decrease of PTP from the basal to distal stem indicates the benefit of a controlled upward tapping system; (3) the logarithmic increase in PTP with rubber tree planting age and age-based mean girth suggests that the preferred age for the commencement of rubber tree tapping is eight years; (4) the change of PTP with regenerated bark age suggests that the regenerated bark could be exploited again after the second year; (5) PTP is positively related to the yield potential of rubber tree clones; (6) although Ethrel stimulation could not significantly increase the initial PTP of a rubber tree, it delays the recovery of PTP after tapping. Therefore, PTP is an indicator of rubber tree latex yield and can be used for tapping system optimization. © 2014 Elsevier B.V.
Language eng
DOI 10.1016/j.indcrop.2014.04.016
Field of Research 060705 Plant Physiology
060702 Plant Cell and Molecular Biology
060799 Plant Biology not elsewhere classified
Socio Economic Objective 820102 Harvesting and Transport of Forest Products
HERDC Research category C1 Refereed article in a scholarly journal
ERA Research output type C Journal article
Copyright notice ©2014, Elsevier BV
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