Salt-induced changes in photosynthetic activity and growth in a potential medicinal plant Bishop's weed (Ammi majus L.)

Title:

Salt-induced changes in photosynthetic activity and growth in a potential medicinal plant Bishop's weed (Ammi majus L.)

Creator:

Ashraf, M., Mukhtar, N., Rehman, S., and Rha, E. S.

Identifier:

https://cdk.lib.cas.cz/client/handle/uuid:76b4ab05-77be-46b9-93a4-39d09a26891a
uuid:76b4ab05-77be-46b9-93a4-39d09a26891a
issn:0300-3604
doi:10.1007/S11099-005-0011-4

Subject:

net photosynthetic rate, salt tolerance, stomatal conductance, transpiration, and water use efficiency

Type:

model:article and TEXT

Format:

bez média and svazek

Description:

Sixty seven-days-old plants of Ammi majus L. were subjected for 46 d to sand culture at varying concentrations of NaCl, i.e. 0 (control), 40, 80, 120, and 160 mM. Increasing salt concentrations caused a significant reduction in fresh and dry masses of both shoots and roots as well as seed yield. However, the adverse effect of salt was more pronounced on seed yield than biomass production at the vegetative stage. Calculated 50 % reduction in shoot dry mass occurred at 156 mM (ca.15.6 mS cm-1), whereas that in seed yield was at 104 mM (ca.10.4 mS cm-1). As in most glycophytes, Na+ and Cl- in both shoots and roots increased, whereas K+ and Ca2+ decreased consistently with the successive increase in salt level of the growth medium. Plants of A. majusmaintained markedly higher K+/Na+ ratios in the shoots than those in the roots, and the ratio remained more than 1 even at the highest external salt level (160 mM). Net photosynthetic (PN) and transpiration (E) rates remained unaffected at increasing NaCl, and thus these attributes had a negative association with salt tolerance of A. majus. Proline content in the shoots increased markedly at the higher concentrations of salt. Essential oil content in the seed decreased consistently with increase in external salt level. Overall, A. majusis a moderately salt tolerant crop whose response to salinity is associated with maintenance of high shoot K+/Na+ ratio and accumulation of proline in shoots, but PN had a negative association with the salt tolerance of this crop. and M. Ashraf ... [et al.].

Language:

Multiple languages

Rights:

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

Coverage:

543-550

Source:

Photosynthetica | 2004 Volume:42 | Number:4

Harvested from:

CDK

Metadata only:

false