Plant Calcium Signaling in Response to Potassium Deficiency

Wang, Xiaoping; Líu, Hao; Zhu, Biping; Jiang, Zhi

doi:10.3390/ijms19113456

Cited by 43 publications

(32 citation statements)

References 166 publications

(236 reference statements)

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“…Potassium is the second (after nitrogen) most abundant mineral element in plants [2]. It is the main cation (K + ) in plant cells [77] and is essential for plant growth and adaptation to the environment [78]. In contrast to nitrogen, potassium is not involved in metabolism and remains in ionic form to execute its specific functions in plant cells [79].…”

Section: Potassium Deficiency and Its Effects On Plantsmentioning

confidence: 99%

“…In contrast to nitrogen, potassium is not involved in metabolism and remains in ionic form to execute its specific functions in plant cells [79]. Potassium is associated with or directly involved in several physiological processes supporting plant growth and development-photosynthesis, protein and starch biosynthesis; transport of sugars and nutrients; and stomatal closure [77,80]. Moreover, K + was shown to be essential in the activation of 50-60 key enzymes, involved in critical metabolic processes [81,82], including photosynthesis, oxidative metabolism and protein synthesis [2].…”

Section: Potassium Deficiency and Its Effects On Plantsmentioning

confidence: 99%

“…In addition, K + plays a crucial role in the establishment of cell turgor and osmoregulation, neutralization/ scavenging of anions (e.g. those of organic and inorganic acids), control of cytosolic pH, ion homeostasis and electrical membrane potential [77,78,83,85].…”

Section: Potassium Deficiency and Its Effects On Plantsmentioning

confidence: 99%

“…The sophisticated network of potassium transport systems, involved in potassium absorption by roots, transport to shoots and further allocation within organs and cells, is the result of millions years of evolution of terrestrial plants [84]. Multiple elements of the potassium transport network were identified as K + channels, transporters and their regulators, comprehensively characterized during the last two decades [77,78,84,[99][100][101][102][103][104].…”

Section: Regulation Of K + Transport Systems and Mobilization Of Vacumentioning

confidence: 99%

“…Recently, elucidation of the mechanisms underlying the regulation of potassium transport in response to potassium starvation stress became a new focus of research, especially those acting both on the transcription and post-transcription levels [77,102]. Various signaling cascades, enhancing transport of K + , triggered by potassium starvation, might rely on reactive oxygen species, phytohormones, calcium and phosphatidic acid [8,77]. Among the mentioned regulatory pathways, involved in the response to potassium deficiency, due to its spatial and temporal specificity, calcium signaling seems to be the most important one [77,120].…”

Section: Regulation Of K + Transport Systems and Mobilization Of Vacumentioning

confidence: 99%

See 4 more Smart Citations

Ion Homeostasis Response to Nutrient-Deficiency Stress in Plants

Osmolovskaya¹,

Shumilina²,

Bureiko³

et al. 2020

Cell Growth

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A crucial feature of plant performance is its strong dependence on the availability of essential mineral nutrients, affecting multiple vital functions. Indeed, mineral-nutrient deficiency is one of the major stress factors affecting plant growth and development. Thereby, nitrogen and potassium represent the most abundant mineral contributors, critical for plant survival. While studying plant responses to nutrient deficiency, one should keep in mind that mineral nutrients, along with their specific metabolic roles, are directly involved in maintaining cell ion homeostasis, which relies on a finely tuned equilibrium between cytosolic and vacuolar ion pools. Therefore, in this chapter we briefly summarize the role of the ion homeostasis system in cell responses to environmental deficiency of nitrate and potassium ions. Special attention is paid to the implementation of plant responses via NO 3 − and K + root transport and regulation of ion distribution in cell compartments. These responses are strongly dependent on plant species, as well as severity and duration of nutrient deficiency.Keywords: nutrient deficiency, ion homeostasis, nitrate, potassium, ion transport mechanisms, vacuolar and cytosolic ion pools Cell Growth 2 of soils, it might be the case in the modern agricultural practice [3]. In particular, deficiency of nitrogen (N) and potassium (K) is quite common in developing and least developed countries, especially in rice and wheat production in Asia, Africa and Central and South America [4]. Such nutrient deficiency eventually leads to decrease of plant productivity and losses of crop yields. Visual manifestations of stress caused by a deficiency of individual macro-and microelements are well documented [5]. The underlying key physiological processes, affected by mineral deficiencies, are well characterized and include photosynthesis, protein synthesis, primary and secondary metabolism and carbohydrate distribution between source and sink tissues [6][7][8].The methods of biochemistry and molecular biology proved to be efficient in disclosing the fine regulatory mechanisms behind ion homeostasis in plants [8]. Thus, the emergence of RNA microarray technology tremendously contributed to the investigation of rapid transcriptional changes associated with mineral imbalance [9][10][11][12][13]. Most of the studies addressing plant responses of ion-transporting systems to deficiencies of K + and NO 3 − rely on Arabidopsis thaliana [9,[11][12][13]. The same is true for phosphorus [14,15], not further detailed here. However, experiments with such crop plants as wheat [16], tomato [17], rice [18], barley, pepper as well as Mesembryanthemum crystallinum [19] revealed a pronounced increase in abundance of K + transporter transcripts in response to potassium starvation. Similarly, expression of nitrate transporters in wheat roots and leaves [20, 21], sorghum [22] and rice [23,24] seedlings was enhanced in response to NO 3 − starvation. The fact, that all mineral nutrients enter the plant in ionic form and, along with i...

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