Responses of Chlorophyll Fluorescence, Stomatal Conductance, and Net Photosynthesis Rates of Four Rubber (Hevea brasiliensis) Genotypes to Drought

Aidil Azhar; Jate Sathornkich; Ratchanee Rattanawong; Poonpipope Kasemsap

doi:10.4028/www.scientific.net/AMR.844.11

Paper Titles

Rubber Trees Affected by Necrotic Tapping Panel Dryness Exhibit Poor Transpiration Regulation under Atmospheric Drought
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The Influence of Rainfall on Growth of Rubber Trees in Marginal Area of Northeast Thailand
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Responses of Chlorophyll Fluorescence, Stomatal Conductance, and Net Photosynthesis Rates of Four Rubber (Hevea brasiliensis) Genotypes to Drought
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Starch Synthesis and Mobilization in Wood and Bark of Rubber Tree, in Relation with Latex Production, (1) Methodological Approach
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A Simple Water Balance Model of Rubber Tree Plantations under Different Evaporative Demand Regimes
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Resilience of Rubber-Based Intercropping System in Southern Thailand
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The Current Status and Future Trends of Farm Production and Marketing of Para-Rubber in the Upper East Coast Provinces of Southern Thailand
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A Comparative Analysis of Smallholders Tapping Practices in Four Rubber Producing Regions of Thailand
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HomeAdvanced Materials ResearchAdvanced Materials Research Vol. 844Responses of Chlorophyll Fluorescence, Stomatal...

Responses of Chlorophyll Fluorescence, Stomatal Conductance, and Net Photosynthesis Rates of Four Rubber (Hevea brasiliensis) Genotypes to Drought

Abstract:

This experiment aimed to evaluate the leaf chlorophyll fluorescence and gas exchange response to drought conditions of young rubber plants with different scions. Buds from four genotypes of a progeny derived from crossed clones of RRIM600 x RRII105 from Nongkhai Rubber Research Center, T187, T186, T149 and T172, were grafted to RRIM 600 rootstocks. Eight-month old plants with two flushes were used in this study. Two levels of water treatment were used, drought condition (W₁) and well-watered as control (W₀). Leaf chlorophyll fluorescence, stomatal conductance (g_s) and net photosynthesis rate (Pn) were investigated in three phases: before drought, during drought and after re-watering. Leaf gas exchange parameters were measured using Li-6400 (LiCor Inc.). Leaf chlorophyll fluorescence was measured using FluorPen FP 100 (Photon Systems Instruments). Before drought, genotype T186 had the greatest net photosynthesis rates followed by T172, T187 and T149; there was no difference in maximum quantum yield of photosystem II (F_v/F_m) and performance index on absorption basis (PI_ABS). Drought conditions caused reduction in stomatal conductance, net photosynthesis rates, and leaf chlorophyll fluorescence in all genotypes. In re-watering conditions, genotype T186 and T172 experienced quick recovery while the others showed partial recovery but the values of all parameters did not reach previous levels before treatment.

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Periodical:

Advanced Materials Research (Volume 844)

Pages:

11-14

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.844.11

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Online since:

November 2013

Authors:

Aidil Azhar, Jate Sathornkich, Ratchanee Rattanawong, Poonpipope Kasemsap

Keywords:

Chlorophyll Fluorescence, Drought Condition, Net Photosynthesis, Rubber Genotypes, Stomatal Conductance

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