Calcium signaling system in plants

Evidence for the transmission of information through electric potentials in injured avocado trees

“…Variations in Ca 2+ concentrations in the cytosol modify the catalytic activity of the enzyme calmonduline (Vian et al, 1996;Leon et al, 2001) as well as the activity of different protein kinases (CDPKs) dependent on Ca 2+ (White and Broadley, 2003;Ludwing et al, 2004;Medvedev, 2005).…”

Potential role of soil calcium in recovery of paper birch following ice storm injury in Vermont, USA

“…The significantly greater soil-Ca and lower soil-Al measured for O a horizons, and the higher Ca concentrations in B horizons adjacent to vigorous trees relative to soils around declining trees is consistent with the possibility that Ca availability influenced the ability of trees to rebound in growth and recover from the 1998 ice storm. Adequate Ca nutrition is required to support at least three processes that are fundamental to overcoming a severe stress such as the crown loss and wounding associated with ice storm damage: (1) structural compartmentalization (Lachaud et al, 1999), (2) the optimization and regulation of carbon (C) relations (including respiration, growth, and C storage/transport; Marschner, 2002;Lautner et al, 2007), and (3) the metabolic control of stress response systems (including systems that support wound closure and defense against fungal pathogens ;Medvedev, 2005;Huggett et al, 2007). Considering this, deficiencies in biological Ca pools may predispose trees to reduced response in growth, wound closure and pathogen defense, thereby resulting in continued decreases in annual growth for declining (low Ca) trees, whereas vigorous (higher Ca) trees can adjust their physiology and rebound in crown condition and growth following damage.…”

The Changes of Power Spectrum of Electrical Signal in Aloe under Several Damage Conditions

“…The cells received over the AP signal to regulate the changes of Ca 2+ concentration in cytoplasm through the ion channel opening and closing in cell membrane enable an ion flux between the cytosol and the extracellular microenvironment, which creates electrical potential differentials across the membrane [26,31]. Variations in Ca 2+ concentrations in the cytosol modify the catalytic activity of the enzyme calmonduline [27][28] as well as the activity of different protein kinases (CDPKs) dependent on Ca 2+ [29][30][31], physiological changes are induced. Thus, the sharp increase of the signal amplitude received by cell would have dramatic impact on ion channel regulation in the cell membrane and physiological changes.…”