 ผลงานตีพิมพ์ในวารสารวิชาการIs growth performance in rubber (Hevea brasiliensis) clones related to xylem hydraulic efficiency?ผู้แต่ง: Krissada Sangsing, Herve Cochard,  Dr.Poonpipope Kasemsap, Associate Professor , Dr.Sornprach Thanisawanyangkura, Associate Professor , Dr.Kumut Sangkhasila, Associate Professor , Eric Gohet, P Thaler, วารสาร: 
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ผลงานตีพิมพ์ในวารสารวิชาการXylem embolism and stomatal regulation in two rubber clones (Hevea brasiliensis Muell. Arg.)ผู้แต่ง:Krissada Sangsing, Dr.Poonpipope Kasemsap, Associate Professor, Dr.Sornprach Thanisawanyangkura, Associate Professor, Dr.Kumut Sangkhasila, Associate Professor, Eric Gohet, P Thaler, Herve Cochard, วารสาร: |
 การประชุมวิชาการFertility and fertilization issues in rubber plantations: new insights from recent research worksผู้แต่ง:Frederic Gay, นางสาวระวิวรรณ โชติพันธ์, Philippe Malagoli, Philippe Thaler, Alain Brauman, Thibaut Perron, Dr.Kannika Sajjaphan, Associate Professor , Heepngoen, P., R?gis Lacote, Eric Gohet, การประชุมวิชาการ: |
 หัวเรื่อง:ไม่มีชื่อไทย (ชื่ออังกฤษ : Distribution Patterns of Latex Sucrose Content and Concurrent Metabolic Activity at the Trunk Level with Different Tapping Systems and in Latex Production Bark of Hevea bras ผู้เขียน:พิศมัย จันทุมา, ดร.ศรปราชญ์ ธไนศวรรยางกูร, รองศาสตราจารย์, ดร.พูนพิภพ เกษมทรัพย์, รองศาสตราจารย์, Eric Gohet, Phillipe Thaler สื่อสิ่งพิมพ์:pdf AbstractDistribution patterns of latex sucrose content and concurrent metabolic activity at the trunk level with different tapping systems, namely 1/2S d/2 (a half spiral cut alternate daily), 1/2S d/3 ET 2.5%.8/y (a half spiral cut one day in tapping followed by two days of rest, stimulated with ethephon, eight applications per year) and DCA (Double Cut Alternate, 2?1/2S d/4 (t,t), two half spiral cuts, each cut tapped alternate on every four days) were studied. RRIM600 rubber trees were used to map the latex metabolic status from different heights on both panel A and panel B. Latex was collected by puncturing trunks at various positions and was analyzed using Latex Diagnosis technique (LD). The concurrent comparison of latex sucrose and inorganic phosphorus concentrations for every sampling position allowed estimating the size and shape of the actual latex regeneration area. Regular tapping induced latex sucrose depletion in tapped panel bark. This sucrose depletion was enhanced by the use of DCA, as a consequence of increased production and therefore higher latex regeneration metabolism. DCA also induced a huge sucrose sink effect above tapped cut on both panel A and panel B and outside the metabolically active area. |
หัวเรื่อง:ไม่มีชื่อไทย (ชื่ออังกฤษ : Increase in Carbohydrate Status in the Wood and Bark Tissues of Hevea brasiliensis by Double-cut Alternative Tapping System) ผู้เขียน:พิศมัย จันทุมา, ดร.ศรปราชญ์ ธไนศวรรยางกูร, รองศาสตราจารย์, ดร.พูนพิภพ เกษมทรัพย์, รองศาสตราจารย์, PhillipeThaler, Eric Gohet สื่อสิ่งพิมพ์:pdf AbstractStarch and total soluble sugar (SS) status in rubber tree were investigated carbohydrate reserve related to tapping system. RRIM 600 clone were studied for three years in Chachoengsao Rubber Research Center (CRRC-RRIT-DOA). Trees were tapped using 1/2S d/2 (control, D/2), 1/2S d/3.ET 2.5%,8/y (D/ 3) and the DCA system (double-cut alternative tapping system). Bark and wood tissue were collected in October 2002 (period of high rainfall and high latex production) at various positions along trunks and were analyzed using starch enzymatic analysis technique. Together with a higher production of latex, DCA system had higher content in both starch and SS in wood. In bark, SS was also higher in DCA, whereas starch was not different among treatments. According to accumulation of starch on various part of tree, it was found that the starch decreased with height of samples up the trunk. Content in lower part of tree was higher than that in the top or crown part, but there was the decrease of starch in both wood and bark within the bark regeneration area or the area which has been already tapped, confirming the hypothesis that tapping affects the level and distribution pattern of carbohydrate within the trunk. |
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ผลงานตีพิมพ์ในวารสารวิชาการCan fertilization be a driver of rubber plantation intensification?ผู้แต่ง:Ms.RAWIWAN CHOTIPHAN , Laurent Vaysse, Regis Lacote, Eric Gohet, Philippe Thaler, Dr.Kannika Sajjaphan, Associate Professor, Celine Bottier, Christine Char, Dr.Siriluck Liengprayoon, Frederic Gay, วารสาร: 
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หัวเรื่อง:ไม่มีชื่อไทย (ชื่ออังกฤษ : Photosynthetic Capacity and Effect of Drought on Leaf Gas
Exchange in Two Rubber (Hevea brasiliensis) Clones) ผู้เขียน:Krissada Sangsing, Xavier Le Roux, ดร.พูนพิภพ เกษมทรัพย์, รองศาสตราจารย์, ดร.ศรปราชญ์ ธไนศวรรยางกูร, รองศาสตราจารย์, ดร.กุมุท สังขศิลา, รองศาสตราจารย์, Eric Gohet, Phillipe Thaler สื่อสิ่งพิมพ์:pdf AbstractPhotosynthetic capacity, water-use efficiency and nitrogen-use efficiency were compared between
two different rubber clones, PB 260 and PB 217. Plants were grown in 50 dm3 pots in a greenhouse at
Clermont-Ferrand, France under controlled condition. Net CO2 assimilation rate at 1800 ppm CO2
(A1800) and at 360 ppm CO2 (A360), maximum carboxylation rate (Vcmax), electron transport capacity
(Jmax) and nitrogen-use efficiency (A1800/Na, A360/Na, Vcmax/Na and Jmax/Na) of clone PB 260 were
significantly higher than those of clone PB 217. However, the dark respiration rate (Rd), the ratio of lightsaturated
rate of electron transport and maximum rate of carboxylation (Jmax/Vcmax), leaf mass per area
(Ma), leaf nitrogen content (Nm), leaf nitrogen per area (Na), water use efficiency (WUE), SPAD value
(SPAD) and chlorophyll fluorescence ratio (Fv/Fm) were non- significantly different between these
clones. Effects of drought on leaf gas exchange rates was also studied. Net CO2 assimilation rate (A),
stomatal conductance (gs) and transpiration rate (E) showed a declining curve as a function of increased
water stress. WUE was high under severe stress, due to a more rapid decrease of E than A. At 14 days after
stress, gs and E decreased by 80-85%, while A decreased by 60-70%. Drought also reduced leaf water
potential, which was possitively related to stomatal conductance. These results confirmed the potential
genotypic variability of some photosynthetic traits under non-water-limited condition and stomatal
behavior related with hydraulic properties during water stress in rubber trees. |
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งานวิจัยการจัดการธาตุอาหารพืชและการใช้สารเร่งเอทธิฟอนต่อผลผลิตและคุณภาพของยางธรรมชาติ (2018)หัวหน้าโครงการ:ดร.กรรณิการ์ สัจจาพันธ์, รองศาสตราจารย์ ผู้ร่วมโครงการ:นายปิยะ ดวงพัตรา, ศาสตราจารย์, ดร.พูนพิภพ เกษมทรัพย์, รองศาสตราจารย์, นางสาวระวิวรรณ โชติพันธ์, นายภาคภูมิ ตันเตชสาธิต, อาจารย์ , ดร.ดวงรัตน์ ศตคุณ, นางสาววุฒิดา รัตนพิไชย, ผู้ช่วยศาสตราจารย์ แหล่งทุน:ทุนอุดหนุนวิจัยมก. ผลลัพธ์:วารสาร (3) |
หัวเรื่อง:ไม่มีชื่อไทย (ชื่ออังกฤษ : Respiration Rate and a Two-component Model of Growth
and Maintenance Respiration in Leaves of Rubber
(Hevea brasiliensis Muell. Arg.)) ผู้เขียน:Krissada Sangsing, ดร.พูนพิภพ เกษมทรัพย์, รองศาสตราจารย์, ดร.ศรปราชญ์ ธไนศวรรยางกูร, รองศาสตราจารย์, Eric Gohet, Philippe Thaler สื่อสิ่งพิมพ์:pdf AbstractThe future information of leaf selection for studies on respiration rate and leaf greenness, and
position variations of different rubber clones was investigated. Respiration rate and greenness were nonsignificantly
different between leaf position (leaf No. 1, 2 and 3) and leaflet position (left, middle and
right), but they were significantly different among clones. During leaf expansion, respiration rate per unit
leaf area declined with leaf age, but the differences were not obviously detected among clones. Leaf
expansion rate was sigmoid shaped curves, and increased with leaf age. Relative growth rate on an area
basis (RGRarea) of leaf declined with age. At fully expanded leaf of PB 235, RRIM 600, PB 260 and GT
1 clones, the greatest leaf area was found in PB 235, and the least in GT 1. For crop growth model
development and environmental response studies, a two- component model of growth and maintenance
respiration was used in leaves of rubber. Growth respiration coefficients were non-significantly different
(ranging from 4.928 ? 105 to 5.678 ? 105 mmolCO2 m-2) among 4 rubber clones. While, the greatest
maintenance coefficients were in RRIM 600, PB 60, GT 1, the least was in PB 235. In particular, strong
positive correlation between respiration rate and RGRarea was found for all clones. Maintenance
respiration was weakly related with leaf temperature, but growth respiration was not significantly related
with leaf temperature. |
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Researcherดร. ศิริลักษณ์ เลี้ยงประยูรที่ทำงาน:ฝ่ายเทคโนโลยีชีวมวลและพลังงานชีวภาพ สถาบันค้นคว้าและพัฒนาผลิตผลทางการเกษตรและอุตสาหกรรมเกษตร สาขาที่สนใจ:การวิเคราะห์องค์ประกอบไขมันLipid Analysis, เทคโนโลยีและคุณภาพยางธรรมชาติ Nutural Rubber Technology Resume |
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