Effect of low irradiance on the photosynthetic performance and spiking of Phalaenopsis

Title:

Effect of low irradiance on the photosynthetic performance and spiking of Phalaenopsis

Creator:

Liu, Y.-C., Liu, C.-H., Lin, Y.-C., Lu, C.-H., Chen, W.-H., and Wang, H.-L.

Identifier:

https://cdk.lib.cas.cz/client/handle/uuid:a9b569c2-6c64-4ced-9c7b-fb67f3d81517
uuid:a9b569c2-6c64-4ced-9c7b-fb67f3d81517
issn:0300-3604
doi:10.1007/s11099-016-0079-z

Subject:

fotosyntéza, photosynthesis, CAM, carbohydrate, chlorophyll fluorescence, flower stalk, gas exchange, oxygen evolution, 2, and 581

Type:

model:article and TEXT

Format:

print, bez média, and svazek

Description:

Lowering irradiance can delay the flower stalk, i.e., spike development, in order to schedule flowering time of Phalaenopsis; however, the effect on photosynthetic performance and spiking inhibition remains poorly understood. We compared light and shade treatments of Phalaenopsis aphrodite subsp. formosana in order to determine how limiting light affects day-night changes in the photosynthetic capacity of leaves and the carbon pool of leaves and stems resulting in delayed spiking. The low irradiance treatment [20 μmol(photon) m-2 s-1] for six weeks did not affect potential functions of photosynthetic apparatus estimated by chlorophyll a fluorescence analysis, but it significantly reduced the net CO2 uptake and O2 evolution rates, carbohydrate and organic acid concentrations, and amplitudes of CAM activity in new and fully expanded leaves of Phalaenopsis and delayed the spiking compared with the control kept at 150 μmol(photon) m-2 s-1. The shortened stem contained a remarkably high sucrose concentration, accounting for more than 80% of total soluble sugars for both treatments throughout the day. Moreover, the sucrose concentration was unaffected by the lowering of irradiance. The relationship between the sucrose content and spiking seemed to be loose; the major factor(s) for spiking in Phalaenopsis remained to be ascertained as the flower stalk bud is attached to the shortened stem., Y.-C. Liu, C.-H. Liu, Y.-C. Lin, C.-H. Lu, W.-H. Chen, H.-L. Wang., and Obsahuje seznam literatury

Language:

Multiple languages

Rights:

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

Coverage:

259-266

Source:

Photosynthetica | 2016 Volume:54 | Number:2

Harvested from:

CDK

Metadata only:

false