Integration between ROS Regulatory Systems and Other Signals in the Regulation of Various Types of Heat Responses in Plants

Abstract

Because of their sessile lifestyle, plants cannot escape from heat stress and are forced to alter their cellular state to prevent damage. Plants, therefore, evolved complex mechanisms to adapt to irregular increases in temperature in the natural environment. In addition to the ability to adapt to an abrupt increase in temperature, plants possess strategies to reprogram their cellular state during pre-exposure to sublethal heat stress so that they are able to survive under subsequent severe heat stress. Such an acclimatory response to heat, i.e., acquired thermotolerance, might depend on the maintenance of heat memory and propagation of long-distance signaling. In addition, plants are able to tailor their specific cellular state to adapt to heat stress combined with other abiotic stresses. Many studies revealed significant roles of reactive oxygen species (ROS) regulatory systems in the regulation of these various heat responses in plants. However, the mode of coordination between ROS regulatory systems and other pathways is still largely unknown. In this review, we address how ROS regulatory systems are integrated with other signaling networks to control various types of heat responses in plants. In addition, differences and similarities in heat response signals between different growth stages are also addressed.

Elongation of stigmatic papillae induced by heat stress is associated with disturbance of pollen attachment inArabidopsis thaliana

“…Previous studies revealed that crosstalk between Ca 2+ , O 2 − and NO signaling regulates multiple processes of reproductive development (Katano et al, 2018a; Prado et al, 2004; Serrano et al, 2015; Traverso et al, 2013). We therefore analyzed the distribution and accumulation of Ca 2+ , O 2 − and NO in flowers with poor or rich pollen attachments (i.e.…”

“…This phenomenon might be involved in pollen recognition. In addition, during the pollen attachment on stigma, antioxidant substance in pollen coat was released into stigma via pollen hydration induced by NO-ROS redox signals (Katano et al, 2018a; Traverso et al, 2013). As for stigma with pollens, Ca 2+ accumulated in pollens and clearly increased in stigma, suggesting that high accumulation of Ca 2+ might be caused by activation of calcium permeable channel via NO derived from pollen (Besson-Bard et al, 2008; Clementi, 1998).…”

“…We can therefore expect that decrease in seed production caused by heat stress might be at least partially attributed to morphological alterations in reproductive organs. Indeed, it has been well known that heat stress dramatically impacts on development of anthers and pollens (Katano et al, 2018a; Rieu and Twell, 2017). However, effects of heat stress on development of other reproductive organs are still largely unknown.…”

Rapid systemic signaling during abiotic and biotic stresses: is the ROS wave master of all trades?

“…Systemic signaling from local to systemic tissues was demonstrated for many types of stresses including abiotic conditions, such as light stress, mechanical stress and temperature stress, as well as biotic stresses, such as bacterial, fungal and viral infections (e.g. Guerra et al , ; Choi et al , ; Katano et al , ; Lai et al , ; Chen et al , ). The faster the systemic response is, the better chance the plant has to acclimate and defend itself against the upcoming abiotic or biotic challenge (Kollist et al , ).…”

Failure of Pollen Attachment to the Stigma Triggers Elongation of Stigmatic Papillae in Arabidopsis thaliana

“…In addition, we can expect that decrease in seed production caused by heat stress might be also at least partially attributed to morphological alterations in reproductive organs (De Storme and Geelen, 2014). Although the research of heat stress response in reproductive organs have progressed from the view point of molecular biology and physiology (Katano et al, 2018a;Suzuki and Katano, 2018), only few studies have focused on morphological alterations of reproductive organs caused by heat stress (De Storme and Geelen, 2014).…”