Tropical and subtropical crops: photosynthesis and yield

Overview

Dr. Eliemar received his DSci (Crop Physiology) at Northern Rio de Janeiro State University (UENF) in 1997 and has been a Associated Professor (Plant Physiology and Ecophysiology) at the UENF since 1999. Dr. Eliemar and colleges has worked with Environmental Physiology of Tropical Fruit Crops, specially papaya, coffee and grapevine plants. The basic propose is determinate the deeper understanding about the effects of the environmental factors (water, air temperature, light and mineral nutrients) over the physiological process [gas-exchange (CO2 assimilation and O2 evolution), sap flow, photosynthetic pigments, chlorophyll fluorescence] in papaya, coffee and gravine. This action is crucial to minimize the deleterious impact of supra and suboptimal environmental conditions and to manage crops for maximum productivity.

Current Projects: •Project 1: Evaluate in coffee leaves the effects of processed-kaolin particle film suspension over the gas-exchange (single leaf and whole canopy), sap flow, canopy temperature, yield, quality •Project 2: Physiological characterization in elite papaya genotypes: Dark and light respiration, and photosynthesis in Golden and Sunrise Solo papaya genotypes with different chlorophyll leaf concentration and yield •Project 3: How papaya genotypes responses to water stress: stomatal and non-stomatal limitations on single leaf and whole canopy •Project 4. Response of papaya genotypes to localized irrigation: hydraulic, non-hydraulic root signals and effects on photosynthesis, yield and quality •Project 5: Photosynthetic metabolism, respiration and yield (Niágara Rosada e BRS Clara in field-grown table grapes under tropical conditions under transparent plastic covering •Project 6: Hydraulic conductance, and single leaf and whole canopy gas exchange in clones elite of Coffea canephora •Projet 7: Biorregulators in papaya plants: effects on photosynthetic capacity, and growth •Project 8: Possible use of chlorophyll fluorescence, near infrared (NIR) and IR thermal imaging to assess gender in papaya plant •Project 9: Water stress in popcorn genotypes: Photosynthetic capacity, growth and yield.

Protocols

Leaf Photosynthesis MultispeQ V1.0

Summary

Measures many photosynthesis-related parameters in <15 seconds, including:

  • Chlorophll Fluorescence: Phi2, PhiNPQ, PhiNO, NPQt, qL, LEF
  • Relative Chlorophyll: SPAD
  • Proton Motive Force: ECSt, vH+, gH+
  • Absorbance at: 450, 535, 605, 650, 730, 850, 880, and 940nm.
  • Leaf Thickness (in mm), angle, and cardinal direct...

Locations

Team

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