TY - JOUR
T1 - Trans-aconitic acid inhibits the growth and photosynthesis of Glycine max
AU - Barreto, George
N1 - Publisher Copyright:
© 2018 Elsevier Masson SAS
PY - 2018/11
Y1 - 2018/11
N2 - Grasses producing trans-aconitic acid, a geometric isomer of cis-aconitic acid, are often used in Glycine max rotation systems. However, the effects of trans-aconitic acid on Glycine max are unknown. We conducted a hydroponic experiment to evaluate the effects of 2.5–10 mM trans-aconitic acid on Glycine max growth and photosynthesis. The results revealed that the enhanced H
2O
2 production in the roots increased the membrane permeability and reduced the water uptake. These effects culminated with a reduced stomatal conductance (g
s), which seems to be the main cause for a decreased photosynthetic rate (A). Due to low g
s, the limited CO
2 assimilation may have overexcited the photosystems, as indicated by the high production of H
2O
2 in leaves. After 96 h of incubation, and due to H
2O
2-induced damage to photosystems, a probable non-stomatal limitation for photosynthesis contributed to reducing A. This is corroborated by the significant decrease in the quantum yield of electron flow through photosystem II in vivo (Φ
PSII) and the chlorophyll content. Taken together, the damage to the root system and photosynthetic apparatus caused by trans-aconitic acid significantly reduced the Glycine max plant growth.
AB - Grasses producing trans-aconitic acid, a geometric isomer of cis-aconitic acid, are often used in Glycine max rotation systems. However, the effects of trans-aconitic acid on Glycine max are unknown. We conducted a hydroponic experiment to evaluate the effects of 2.5–10 mM trans-aconitic acid on Glycine max growth and photosynthesis. The results revealed that the enhanced H
2O
2 production in the roots increased the membrane permeability and reduced the water uptake. These effects culminated with a reduced stomatal conductance (g
s), which seems to be the main cause for a decreased photosynthetic rate (A). Due to low g
s, the limited CO
2 assimilation may have overexcited the photosystems, as indicated by the high production of H
2O
2 in leaves. After 96 h of incubation, and due to H
2O
2-induced damage to photosystems, a probable non-stomatal limitation for photosynthesis contributed to reducing A. This is corroborated by the significant decrease in the quantum yield of electron flow through photosystem II in vivo (Φ
PSII) and the chlorophyll content. Taken together, the damage to the root system and photosynthetic apparatus caused by trans-aconitic acid significantly reduced the Glycine max plant growth.
U2 - 10.1016/j.plaphy.2018.09.036
DO - 10.1016/j.plaphy.2018.09.036
M3 - Article
VL - 132
SP - 490
EP - 496
JO - Plant Physiol Biochemplant Physiol Biochem
JF - Plant Physiol Biochemplant Physiol Biochem
ER -