Effects of the interaction between vapor-pressure deficit and salinity on growth and photosynthesis of Cucumis sativus seedlings under different CO2 concentrations

Title:

Effects of the interaction between vapor-pressure deficit and salinity on growth and photosynthesis of Cucumis sativus seedlings under different CO2 concentrations

Creator:

Shibuya, T., Kano, K., Endo, R., and Kitaya, Y.

Identifier:

https://cdk.lib.cas.cz/client/handle/uuid:1283cec7-c718-4562-8054-85eb0eddb7c2
uuid:1283cec7-c718-4562-8054-85eb0eddb7c2
issn:0300-3604
doi:10.1007/s11099-017-0746-8

Subject:

vlhkost vzduchu, humidity, poptávka po odpařování, výměna plynu, analýza růstu, reakce na stres, vodní potenciál, evaporative demand, gas exchange, growth analysis, stress response, water potential, 2, and 581

Type:

model:article and TEXT

Format:

print, bez média, and svazek

Description:

We studied growth and photosynthesis of cucumber (Cucumis sativus) seedlings under two vapor-pressure deficit levels (VPD; 0.4 and 3.0 kPa), two salinity levels (0 mM and 34 mM NaCl), and two CO2 concentrations ([CO2]; 400 and 1,000 μmol mol-1). Relative growth rate (RGR) decreased with increasing VPD, but the causal factor differed between salinity levels and CO2 concentrations. Under ambient [CO2], RGR decreased with increasing VPD at low salinity mainly due to decreased leaf area ratio (LAR), and decreased net assimilation rate (NAR) at high salinity. The decrease in intercellular [CO2] (Ci) with decreasing stomatal conductance caused by high VPD did not significantly limit net photosynthetic rate (PN) at low salinity, but PN was potentially limited by Ci at high salinity. At high [CO2], high VPD reduced LAR, but did not affect NAR. This is because the decrease in Ci occurred where slope of PN-Ci curve was almost flat., T. Shibuya, K. Kano, R. Endo, Y. Kitaya., and Obsahuje bibliografii

Language:

Multiple languages

Rights:

http://creativecommons.org/licenses/by-nc-sa/4.0/
policy:public

Coverage:

893-900

Source:

Photosynthetica | 2018 Volume:56 | Number:3

Harvested from:

CDK

Metadata only:

false