Euphytica

, Volume 88, Issue 1, pp 35–45

Heat tolerance in food legumes as evaluated by cell membrane thermostability and chlorophyll fluorescence techniques

Authors

  • Ancha Srinivasan
    • Japan International Research Center for Agricultural Sciences (JIRCAS), Okinawa Subtropical StationInternational Collaboration Research Section
  • Hiroyuki Takeda
    • Japan International Research Center for Agricultural Sciences (JIRCAS), Okinawa Subtropical StationInternational Collaboration Research Section
  • Toshihiro Senboku
    • Japan International Research Center for Agricultural Sciences (JIRCAS), Okinawa Subtropical StationInternational Collaboration Research Section
Article

DOI: 10.1007/BF00029263

Cite this article as:
Srinivasan, A., Takeda, H. & Senboku, T. Euphytica (1996) 88: 35. doi:10.1007/BF00029263

Summary

The genotypic variation for heat tolerance in chickpea, groundnut, pigeonpea, and soya bean was evaluated by testing membrane stability and photosystem (PSII) function in leaves at high temperatures. The legumes could be ranked from heat-tolerant to sensitive in the order: groundnut, soya bean, pigeonpea and chickpea. The damage to cell membranes (as reflected by an increased leakage of electrolytes) and PS II (as reflected by a decrease in the ratio of variable to maximum fluorescence) was less, and recovery from heat stress was faster in groundnut than in other crops. Prior exposure of plants to 35°C for 24h led to a reduced leakage of electrolytes at high temperatures in all crops but the differences among legumes were consistent. Substantial genotypic variation for heat tolerance was found in all legumes. Membrane injury was negatively associated with specific leaf weight in groundnut (r=−0.69**) and soya bean (r=−0.56**) but not in the pulses. Electrolyte leakage and fluorescence ratio were negatively correlated in all legumes. The potential use of electrolyte leakage and fluorescence tests as screening procedures for breeding heat-tolerant legumes is discussed.

Key words

Chickpeachlorophyll fluorescencegroundnutheat tolerancemembrane stabilityphotosystempigeonpeascreening methodssoya beanthermostabilityCicer arietinumGlycine maxArachis hypogaeaCajanus cajan

Abbreviations

RI

relative injury

Fo

initial fluorescence

Fm

maximum fluorescence

Fv

variable fluorescence

PS II

photosystem II

PAR

photosynthetically active radiation

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Copyright information

© Kluwer Academic Publishers 1996