Genotype differences in the metabolism of proline and polyamines under moderate drought in tomato plants

Abstract

Water stress is one of the most important factors limiting the growth and productivity of crops. The implication of compatible osmolytes such as proline and polyamines in osmotic adjustment has been widely described in numerous plants species under stress conditions. In the present study, we investigated the response of five cherry tomato cultivars (Solanum lycopersicum L.) subjected to moderate water stress in order to shed light on the involvement of proline and polyamine metabolism in the mechanisms of tolerance to moderate water stress. Our results indicate that the most water stress-resistant cultivar (Zarina) had increased degradation of proline associated with increased polyamine synthesis, with a higher concentration of spermidine and spermine under stress conditions. In contrast, Josefina, the cultivar most sensitive to water stress, showed a proline accumulation associated with increased synthesis after being subjected to stress. In turn, in this cultivar, no rise in polyamine synthesis was detected. Therefore, all the data appear to indicate that polyamine metabolism is more involved in the tolerance response to moderate water stress.

Effects of spermidine and salinity stress on growth and biochemical response of paraquat‐susceptibe and ‐resistant goosegrass (Eleusine indica L.)

“…Proline, as a molecular chaperone, was able to protect protein integrity and enhance the activities of different enzymes by its scavenging activity and by acting as a singlet oxygen quencher (Szabados & Savouré 2010;Hussain et al 2011). Proline accumulation may reduce stress-induced cellular acidification or prime oxidative respiration to provide energy needed for recovery (Montesinos- Pereira et al 2014). In this study, salinity significantly increased the content of proline (Fig.…”

“…Proline accumulation may reduce stress‐induced cellular acidification or prime oxidative respiration to provide energy needed for recovery (Montesinos‐Pereira et al . ). In this study, salinity significantly increased the content of proline (Fig.…”

“…PAs bind to nucleic acids and proteins and decrease membrane permeability and cell wall constituents (Ding et al 2010). It has already been reported that PAs play a pivotal role in regulating the defense response of plants to diverse environmental stresses (Sfakianaki et al 2006;Demetriou et al 2007; Montesinos- Pereira et al 2014;Shu et al 2014). The accumulation of PAs and proline and enhancement of antienzyme activities in cucumber seedlings by exogenously added Spd to salinized nutrient solution lead to osmotic adjustment during salinity (Duan et al 2008).…”

Physio‐biochemical assessment and expression analysis of genes associated with drought tolerance in sugarcane (Saccharum spp. hybrids) exposed to GA3 at grand growth stage

“…Montesinos‐Pereira et al . () hypothesised that proline levels are not necessarily positively correlated with stress tolerance as proline catabolism is required for stress‐induced ROS compensation (Sharma et al . ).…”

Proline accumulation in sugarcane roots subjected to drought conditions

“…Water deficit stands out among the numerous abiotic factors that most significantly reduce the performance of sugarcane plantations, which is the main cause of reductions in productivity Montesinos-Pereira et al, 2014). To deal with this problem, some papers (Carlin & Santos, 2009;Queiroz et al, 2011;Gimenez et al, 2013) on water deficit have been developed in the search for drought-tolerant cultivars.…”