Photosynthesis of different ecotypes of Miscanthus spp. as affected by water stress

Title:

Photosynthesis of different ecotypes of Miscanthus spp. as affected by water stress

Creator:

Weng, J.-H.

Identifier:

https://cdk.lib.cas.cz/client/handle/uuid:81b12011-e5ff-4d84-be93-2a12b69577ef
uuid:81b12011-e5ff-4d84-be93-2a12b69577ef
urnnbn:urn:nbn:cz:aba007-000ffz

Type:

model:internalpart and TEXT

Format:

print

Description:

Four dones of Miscanthus spp., collected from regions with different rainfall distribution, were transplanted in pots and subjected to five drying cycles (each of 6- 7 d). Gas exchanges were measured on attached leaves, The light-saturated photosynthetic CO2 uptake (P^) began to dechne when the leaf water potential (y\) was reduced to -1.3 - -1.5 MPa, and the values corresponding to 50 % decrease P^)] were -1.6 - -2.6 MPa. The P^ ) values were lower in a cloně collected from Kilung (northem Taiwan, highly frequent rainfall) than in dones collected from Kenting (southem Taiwan, distinct wet and dry season). Besides, the ^(1/2 Pj^) value became lower in all the tested dones when the drying cycle advanced (in the drying cycle of northem Taiwan cloně and in the 5‘*’ drying cycle of southem Taiwan dones, řespectively). Both the stomatal and non- stomatal factors of photosynthesis were affected by water deficit, and the osmotic adjustment mitigated the negative impact of water deficit on both factors. The clonal differences in the tolerance and acdimation of photosynthesis to water deficit are dosely related to the osmotic adjustment, and the clonal differences in osmotic adjustment reflect the rainfall pattem of sampled region.

Language:

Multiple languages

Rights:

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

Coverage:

43-48 and 45-50

Source:

Photosynthetica | 1993 Volume:29 | Number:1

Harvested from:

CDK

Metadata only:

false