สืบค้นงานวิจัย
The source of latex. Tracing carbon from leaf photosynthesis to latex metabolism in rubber trees using carbon stable isotopes
Philippe Thaler - ไม่ระบุหน่วยงาน
ชื่อเรื่อง (EN): The source of latex. Tracing carbon from leaf photosynthesis to latex metabolism in rubber trees using carbon stable isotopes
ผู้แต่ง / หัวหน้าโครงการ (EN): Philippe Thaler
บทคัดย่อ (EN): One of the main challenges for the future of Natural Rubber production is the scarcity of skilled manpower to tap the trees. The only way to cope with such issue is to reduce the tapping frequency. The key is the carbon supply to the latex producing tissues. With low tapping frequencies, the latex exported at each tapping day is higher than in traditional systems. Then the trees must mobilize huge amount of carbon at each tapping. Does the latex carbon come directly from the primary sources, the leaves where C is assimilated through photosynthesis, or from reserve pools as wood starch, or both? Knowing the actual C sources and knowing the pathways towards latex is then necessary to manage the tapping systems. Stable isotopes and especially 13C are widely used in plant science as tracers but studying their natural abundance also provides insightful information on tree physiology. We first compared the seasonal variations in natural abundance in tapped and untapped latex of RRIM600 trees to the variations in their leaves which vary according to climate and phenology. We showed that latex δ13C was higher and varied much less than that of leaves in tapped trees. The lack of correlation between variations in δ13C in leaves and in latex suggests that recent photosynthates are mixed in a large pool of stored carbohydrates that are involved in latex regeneration after tapping. We then did a field labeling of full crowns of 3y-old tapped rubber trees with 13CO2 to trace the carbon from its assimilation in the leaves to the tree sinks and particularly to latex. Such experiment, using a specifically designed chamber, has never been done on rubber trees. Three trees (RRIT 408) were labelled in June and three other in October. We sampled leaves, phloem, wood and latex to analyze their 13C content and determine the dynamics of carbon allocation from leaves to reserves and latex. The latex samples will be followed during one year. The presentation describes the methodology and preliminary results showing that the labelling operation was successful.
บทคัดย่อ: ไม่พบข้อมูลจากหน่วยงานต้นทาง
ภาษา (EN): en
เอกสารแนบ (EN): https://agritrop.cirad.fr/582928/
เผยแพร่โดย (EN): การยางแห่งประเทศไทย
คำสำคัญ (EN): carbon stable isotopes
เจ้าของลิขสิทธิ์ (EN): การยางแห่งประเทศไทย
หากไม่พบเอกสารฉบับเต็ม (Full Text) โปรดติดต่อหน่วยงานเจ้าของข้อมูล

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Philippe Thaler. "The source of latex. Tracing carbon from leaf photosynthesis to latex metabolism in rubber trees using carbon stable isotopes". ไม่ระบุหน่วยงาน. ม.ป.ป.

Philippe Thaler. "The source of latex. Tracing carbon from leaf photosynthesis to latex metabolism in rubber trees using carbon stable isotopes". ไม่ระบุหน่วยงาน. ม.ป.ป.. Print.



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The source of latex. Tracing carbon from leaf photosynthesis to latex metabolism in rubber trees using carbon stable isotopes
Philippe Thaler
การยางแห่งประเทศไทย
ไม่ระบุวันที่เผยแพร่
Effects of drought and tapping for latex production on water relations of Hevea brasiliensis trees Effect of fertilization on latex yield potential and physiological parameters of clone PB 217 in Cambodia A Process for Preparation of Carbon Black / Silica / Nanoclay Master Batch from Fresh Natural Rubber Latex FORESTATION WITH RUBBER FOR CARBON MARKETS; YIELD TABLES UNDER SRI LANKAN CONDITIONS Lipid composition of Hevea brasiliensis latex and dry rubber: characterization and relation with some physical properties Surveillance on Corynespora Leaf Fall Disease: Incidence and Severity on Natural Rubber (Hevea brasiliensis) in Certain Hot Spots Areas in Kerala A METHOD FOR PRODUCING CARBON BLACK SILICA MASTER BATCH Conversion of Lignocellulosic Material in Rubber Unused Plant Part EFFECT OF SLOW RELEASE FERTILIZER ON THREE-WHORL POLYBAG RUBBER PLANTING Effect of Carbon Black and BaSo4 on the Thermo-Chemical Resistance of Natural Rubber Composite
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