Photosynthetica

, Volume 54, Issue 2, pp 226–233 | Cite as

Different mechanisms of photosynthetic response to drought stress in tomato and violet orychophragmus

  • W. H. Sun
  • Y. Y. Wu
  • X. Y. Wen
  • S. J. Xiong
  • H. G. He
  • Y. Wang
  • G. Q. Lu
Original papers
  • 387 Downloads

Abstract

Carbonic anhydrase (CA) catalyzes reversible hydration of CO2 and it can compensate for the lack of H2O and CO2 in plants under stress conditions. Antioxidative enzymes play a key role in scavenging reactive oxygen species and in protecting plant cells against toxic effects. Tomato represents a stress-sensitive plant while violet orychophragmus belongs to adversity-resistant plants. In order to study the drought responses in tomato and violet orychophragmus plants, CA and antioxidative enzyme activities, photosynthetic capacity, and water potential were determined in plants under drought stress. We found that there were similar change trends in CA activity and drought tolerance in violet orychophragmus, and in antioxidative enzymes and drought tolerance in tomato plants. Basic mechanisms of drought resistance should be identified for understanding of breeding measures in plants under stress conditions.

Additional key words

chlorophyll fluorescence gas exchange Orychophragmus violaceus Solanum lycopersicum 

Abbreviations

CA

carbonic anhydrase

CAT

catalase

Ci

intercellular CO2 concentration

E

transpiration rate

F0

minimal fluorescence yield of the dark-adapted state

Fm

maximal fluorescence yield of the dark-adapted state

FM

fresh mass

Fv/Fm

maximal photochemical efficiency of PSII

gs

stomatal conductance

MDA

malondialdehyde

MiD

mild drought

MoD

moderate drought

\(O_2^{\underset{\raise0.3em\hbox{$\smash{\scriptscriptstyle\cdot}$}}{ - } }\)

superoxide radical

OV

violet orychophragmus (Orychophragmus violaceus)

PEPC

phosphoenolpyruvate carboxylase

PN

net photosynthetic rate

ROS

reactive oxygen species

RWC

relative water capacity

SeD

severe drought

SL

tomato (Solanum lycopersicum)

SOD

superoxide dismutase

WUE

water-use efficiency

WW

well watered

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Copyright information

© The Institute of Experimental Botany 2016

Authors and Affiliations

  • W. H. Sun
    • 1
  • Y. Y. Wu
    • 2
  • X. Y. Wen
    • 1
  • S. J. Xiong
    • 1
  • H. G. He
    • 1
  • Y. Wang
    • 1
  • G. Q. Lu
    • 1
  1. 1.College of Food and Biological EngineeringJiangsu UniversityZhenjiangChina
  2. 2.Institute of Agricultural EngineeringJiangsu UniversityZhenjiangChina

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