Shifts in photosynthetic responses to írradiance and temperature in Viola species

Title:

Shifts in photosynthetic responses to írradiance and temperature in Viola species

Creator:

Mishio, M.

Identifier:

https://cdk.lib.cas.cz/client/handle/uuid:5a9c0cfd-497d-4653-8f75-db4e48647139
uuid:5a9c0cfd-497d-4653-8f75-db4e48647139
urnnbn:urn:nbn:cz:aba007-000fn5

Subject:

chlorophyll, Viola keiskei, Viola hondoensis-, specific leaf mass, seasonal course of gas exchange, and dark respiration rate

Type:

model:internalpart and TEXT

Format:

print

Description:

The steady-state photosynthetic irradiance and temperature responses of Viola hondoensis and V. keiskei (Violaceae) growing in proximity in their nati ve environment and under three levels of artificial shade of relative irradiance (RI) of 7, 20 and 50 % were investigated. The maximum photosynthetic rates and temperature optima under natural conditions were much higher in V. keiskei than in V. hondoensis, except when in leaves of V. keiskei chlorophyll was degraded due to autumn frosts. When grown under artificial shade, both species had higher temperature optima as RI decreased. Since leaves under the three RI conditions experienced a similar leaf temperature, it was concluded that the shifts in the temperature responses with RI resulted from acclimation to the varying irradiance. The higher temperature optima observed in V. keiskei under natural conditions were probably due to the fact that V. keiskei grew in more shady microhabitats than V. hondoensis.

Language:

Multiple languages

Rights:

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

Coverage:

127-134 and 129-136

Source:

Photosynthetica | 1995 Volume:31 | Number:1

Harvested from:

CDK

Metadata only:

false