RT Journal Article
T1 Biomass production and predicted ethanol yield are linked with optimum photosynthesis in phragmites karka under salinity and drought conditions
A1 Abideen, Zainul
A1 Koyro, Hans Werner
A1 Hussain, Tabassum
A1 Rasheed, Aysha
A1 Alwahibi, Mona S.
A1 Elshikh, Mohamed Soliman
A1 Hussain , Muhammad Iftikhar
A1 Zulfiqar, Faisal
A1 Mansoor, Simeen
A1 Abbas, Zaheer
K1 2417 Biología Vegetal (Botánica)
K1 2302.25 Fotosíntesis
K1 2508 Hidrología
AB Plant photosynthesis and biomass production are closely associated traits but critical to unfavorable environmental constraints such as salinity and drought. The relationships among stress tolerance, photosynthetic mechanisms, biomass and ethanol yield were assessed in Phragmites karka. The growth parameters, leaf gas exchange and chlorophyll fluorescence of P. karka were studied when irrigated with the control and 100 and 300 mM NaCl in a nutrient solution and water deficit conditions (drought, at 50% water holding capacity). The plant shoot fresh biomass was increased in the low NaCl concentration; however, it significantly declined in high salinity and drought. Interestingly the addition of low salinity increased the shoot biomass and ethanol yield. The number of tillers was increased at 100 mM NaCl in comparison to the control treatment. High salinity increased the photosynthetic performance, but there were no significant changes in drought-treated plants. The saturated irradiance (Is) for photosynthesis increased significantly in low salinity, but it declined (about 50%) in high salt-stressed and (about 20%) in drought-treated plants compared to the control. The rates of dark respiration (Rd) and compensation irradiance (Ic) were decreased significantly under all treatments of salinity and drought, with the exception of unchanged Rd values in the control and drought treatments. A-Ci curve analyses revealed a significant improvement in the Jmax, Vc, max, and triose-phosphate utilization (TPU) at lower salinity levels but decreased at 300 mM NaCl and drought treatments compared to the control. In the chlorophyll fluorescence parameters (Fv/Fm, maximum photochemical quantum yield of PSII, and Y(NO)), the non-photochemical yields were not affected under the salt and drought treatments, although an effective photochemical quantum yield (YII) and electron transport rate (ETR) were significantly enhanced in water deficit compared to control plants. P. karka regulates an efficient photosynthesis mechanism to grow in saline and arid areas and can therefore be used as a sustainable biofuel crop.
PB Plants
SN 22237747
YR 2022
FD 2022-06-23
LK http://hdl.handle.net/11093/3638
UL http://hdl.handle.net/11093/3638
LA eng
NO Plants, 11(13): 1657 (2022)
NO King Saud University | Ref. RSP-2021/173
DS Investigo
RD 11-dic-2024