Effects of abscisic acid on the contents of polyamines and proline in common bean plants under salt stress

Effect of drought and combined drought and heat stress on polyamine metabolism in proline-over-producing tobacco plants

“…3 and 4). This is consistent with the results of a previous study on bean seedlings under salt stress [36]. Although the precise role of Put in plants under adverse stress conditions is still controversial, many reports have shown that Spm helps to protect plants against drought stress [37,20].…”

Metabolic and molecular-genetic regulation of proline signaling and itscross-talk with major effectors mediates abiotic stress tolerance in plants

“…The cross-talk between Pro accumulation and PA synthesis has been recently postulated to be mediated by ABA (Shevyakova et al, 2013). Such cross-talk was studied in the glycophyte Phaseolus vulgaris exposed to salt stress.…”

“…The normal levels of Put and Spd were restored. However, in contrast to wild-type plants, the Spm and cadaverine levels increased by 4-to 5-fold with a reduction in the contents of 1,3-diaminopropane and malondialdehyde (MDA) and also the activity of SOD (Shevyakova et al, 2013;Roychoudhury and Das, 2014). Thus, it was hypothesized that since both the biosynthetic pathways of Pro and PAs utilize glutamate as the common precursor, it is this step that is regulated by ABA in mediating the cross-talk.…”

Occurrence of polyamines in root nodules of Phaseolus vulgaris in symbiosis with Rhizobium tropici in response to salt stress

“…Common PAs putrescine (Put), spermidine (Spd) and spermine (Spm) are the most abundant in the plant cells and have been proposed as a new category of plant growth regulators involved in a variety of physiological processes such as cell division and elongation, root growth, flower and fruit development and membrane stabilization among others (Bais and Ravishankar, 2002;Liu et al, 2007;Kusano et al, 2008;Zhao and Yang, 2008). PAs are also implicated in the protection against of a wide variety of environmental stresses including salinity (Shevyakova et al, 2013) due to their capacity to stabilize macromolecules such as RNA, DNA, proteins and phospholipids, and to their free radical scavenging activity (Groppa and Benavides, 2008;Hussain et al, 2011). In plant cells, PAs occur as free bases but may also be covalently liked to small molecules such as hydroxycinnamic acids to form soluble conjugated PAs.…”