Involvement of reactive oxygen species in endosperm cap weakening and embryo elongation growth during lettuce seed germination

Abstract

SummaryEndosperm weakening and radicle elongation of lettuce seeds were separated by using sodium dichloroisocyanurate, and the roles of ROS in these processes were studied. A novel method was used for endosperm puncture force measurement.

Exogenous spermidine improves seed germination of sweet corn via involvement in phytohormone interactions, H2O2 and relevant gene expression

“…Hydrogen peroxide (H 2 O 2 ) was shown to be associated with endosperm weakening in lettuce seeds. During seed germination, the H 2 O 2 amount and the peroxidase activity in the endosperm cap of lettuce seed increased rapidly; while the endosperm cap puncture force decreased obviously [65]. However, whether seed germination improvement by Spd is related with the change of H 2 O 2 is still need further study.…”

The Dynamic of some Biochemical Indicators at Species of Medicinal Plants from Areas of Suceava County, Romania, Emerged under the Mining Pollution Influence

“…On the other hand, the lower catalasic activity signalized at Mentha longifolia L., comparatively with Plantago major L., can be explained by the genetic background and the species specificity, but also by the epigenetic adjustment through the interaction with environmental factors 58 . POX is an oxidoreductase with mainly role in the defense of the vegetable organisms against the biogenic stress and the abiotic stress, it being able to be associated with a high number of essential metabolic processes like the cells' elongation, their lignification, the phenolic oxidation, the growth and the morphogenesis processes [59][60][61][62] , modifications of this enzyme's activity taking place in the modulation processes of cellular differences and of tissues' development 63 .…”

Morphological and Biochemical Answer of the Wheat Seeds at Treatment with 2,4-Dinitrophenol and Potassium Iodate

“…Certainly the much higher activity of the peroxidase from the experimental batches is caused by treatment with 2,4-dinitrophenol and it can be associated with an intervention in lignification, suberization (the peroxidase is implicated in the polymerization of the aromatic monomers), auxins catabolism, in the processes of germination and growth of seedlings. According to some authors (Øestergaard et al 2000;Schopfer 2001;Passardi et al 2005;Diaz-Tiaels et al 2012;Zhang et al 2014) it can be associated with a high number of metabolic processes such as cellular elongation and lignification, phenolic oxidation, defense against stress represented by different pathogens and abiotic stress this enzyme playing an important role in seed germination, in the processes of growth and morphogenesis, modifications of this oxidoreductase occurring during modulation of the cellular differentiation processes and tissue development (Kawano 2003). The increase in the peroxidase activity measured in our experiments is in agreement with data collected in tomato seeds (Morohashi 2002), which demonstrated hydrogen peroxide formation and a decrease in NADH production in the endosperm before the emergence of the radicles.…”