Brassinosteroid action and its relation with heat stress mechanisms in plants

Mazorra, L. M.

doi:10.1007/978-94-007-0189-2_10

Cited by 8 publications

(7 citation statements)

References 52 publications

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“…In plants that are exposed to high/low temperatures, the application of BR changes the physicochemical properties of the plant plasma membrane, regulates photosynthesis and sugar production, and generally controls the various directions of the metabolism of plants through its interactions with other phytohormones (for a review, see Sadura and Janeczko [14]). Studies on BR mutants revealed that the endogenous content of BRs or disturbances in BR signaling have an impact on the temperature stress tolerance of Arabidopsis thaliana, tomato, and barley plants [15][16][17]. BR mutants with a disturbed BR signaling or with a BR deficit resulting from mutations of the gene encoding enzymes that control the specific steps of BR biosynthetic pathways are generally good models for studying the role of these phytohormones in plants.…”

Section: Introductionmentioning

confidence: 99%

HSP Transcript and Protein Accumulation in Brassinosteroid Barley Mutants Acclimated to Low and High Temperatures

Sadura

Libik-Konieczny

Jurczyk

et al. 2020

IJMS

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In temperature stress, the main role of heat-shock proteins (HSP) is to act as molecular chaperones for other cellular proteins. However, knowledge about the hormonal regulation of the production of the HSP is quite limited. Specifically, little is known about the role of the plant steroid hormones—brassinosteroids (BR)—in regulating the HSP expression. The aim of our study was to answer the question of how a BR deficit or disturbances in its signaling affect the accumulation of the HSP90, HSP70, HSP18, and HSP17 transcripts and protein in barley growing at 20 °C (control) and during the acclimation of plants at 5 °C and 27 °C. In barley, the temperature of plant growth modified the expression of HSPs. Furthermore, the BR-deficient mutants (mutations in the HvDWARF or HvCPD genes) and BR-signaling mutants (mutation in the HvBRI1 gene) were characterized by altered levels of the transcripts and proteins of the HSP group compared to the wild type. The BR-signaling mutant was characterized by a decreased level of the HSP transcripts and heat-shock proteins. In the BR-deficient mutants, there were temperature-dependent cases when the decreased accumulation of the HSP70 and HSP90 transcripts was connected to an increased accumulation of these HSP. The significance of changes in the accumulation of HSPs during acclimation at 27 °C and 5 °C is discussed in the context of the altered tolerance to more extreme temperatures of the studied mutants (i.e., heat stress and frost, respectively).

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Section: Introductionmentioning

confidence: 99%

HSP Transcript and Protein Accumulation in Brassinosteroid Barley Mutants Acclimated to Low and High Temperatures

Sadura

Libik-Konieczny

Jurczyk

et al. 2020

IJMS

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“…Brassinosteroids are steroidal hormones which play a role in responses to various abiotic stresses, such as heat, salt and drought stress. They interact with heat shock proteins and also play a role in ROS scavenging [ 141 ]. Under heat stress (35 °C for 4 h), the in vitro pollen germination of tomato was increased in the presence of 24-epibrassinolide, a brassinosteroid [ 142 ], demonstrating a role for brassinosteroids in pollen germination under high temperatures.…”

Section: Impact Of Heat Stress On Pollen Metabolitesmentioning

confidence: 99%

The Metabolic Basis of Pollen Thermo-Tolerance: Perspectives for Breeding

Paupière

Heusden²,

Bovy³

2014

Metabolites

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Crop production is highly sensitive to elevated temperatures. A rise of a few degrees above the optimum growing temperature can lead to a dramatic yield loss. A predicted increase of 1–3 degrees in the twenty first century urges breeders to develop thermo-tolerant crops which are tolerant to high temperatures. Breeding for thermo-tolerance is a challenge due to the low heritability of this trait. A better understanding of heat stress tolerance and the development of reliable methods to phenotype thermo-tolerance are key factors for a successful breeding approach. Plant reproduction is the most temperature-sensitive process in the plant life cycle. More precisely, pollen quality is strongly affected by heat stress conditions. High temperature leads to a decrease of pollen viability which is directly correlated with a loss of fruit production. The reduction in pollen viability is associated with changes in the level and composition of several (groups of) metabolites, which play an important role in pollen development, for example by contributing to pollen nutrition or by providing protection to environmental stresses. This review aims to underline the importance of maintaining metabolite homeostasis during pollen development, in order to produce mature and fertile pollen under high temperature. The review will give an overview of the current state of the art on the role of various pollen metabolites in pollen homeostasis and thermo-tolerance. Their possible use as metabolic markers to assist breeding programs for plant thermo-tolerance will be discussed.

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“…The genes that are responsible, among others, for the biosynthesis and perception of BR were discovered and it was found that the mutation that is associated with the loss of the function of these genes leads to significant disturbances in plant growth (including a short hypocotyl, dwarfism in seedlings and mature plants and dark green shortened leaves) [ 22 ]. However, it is already known that the action of BR is multidirectional and that it also concerns the regulation of plant development and their response to stress factors [ 23 , 24 , 25 ]. The multidirectional activity of BR includes changes in the membrane physicochemical properties (changes in the proportion of unsaturated fatty acids and the possibility of BR incorporation into the membranes, which modifies its properties), regulates the expression of some proteins and genes ( HSP, COR ) and regulates the plant metabolism through other hormones or signaling molecules (ABA, JA, or hydrogen peroxide) [ 5 , 24 , 25 , 26 , 27 , 28 ].…”

Section: Introduction: Plant Steroid Hormones—brassinosteroidsmentioning

confidence: 99%

“…However, it is already known that the action of BR is multidirectional and that it also concerns the regulation of plant development and their response to stress factors [ 23 , 24 , 25 ]. The multidirectional activity of BR includes changes in the membrane physicochemical properties (changes in the proportion of unsaturated fatty acids and the possibility of BR incorporation into the membranes, which modifies its properties), regulates the expression of some proteins and genes ( HSP, COR ) and regulates the plant metabolism through other hormones or signaling molecules (ABA, JA, or hydrogen peroxide) [ 5 , 24 , 25 , 26 , 27 , 28 ]. BR are also important factors in regulating photosynthesis, for example, they can influence PSII efficiency [ 5 , 23 , 26 , 28 ].…”

Section: Introduction: Plant Steroid Hormones—brassinosteroidsmentioning

confidence: 99%

Brassinosteroids and the Tolerance of Cereals to Low and High Temperature Stress: Photosynthesis and the Physicochemical Properties of Cell Membranes

Sadura

Janeczko

2021

IJMS

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Cereals, which belong to the Poaceae family, are the most economically important group of plants. Among abiotic stresses, temperature stresses are a serious and at the same time unpredictable problem for plant production. Both frost (in the case of winter cereals) and high temperatures in summer (especially combined with a water deficit in the soil) can result in significant yield losses. Plants have developed various adaptive mechanisms that have enabled them to survive periods of extreme temperatures. The processes of acclimation to low and high temperatures are controlled, among others, by phytohormones. The current review is devoted to the role of brassinosteroids (BR) in cereal acclimation to temperature stress with special attention being paid to the impact of BR on photosynthesis and the membrane properties. In cereals, the exogenous application of BR increases frost tolerance (winter rye, winter wheat), tolerance to cold (maize) and tolerance to a high temperature (rice). Disturbances in BR biosynthesis and signaling are accompanied by a decrease in frost tolerance but unexpectedly an improvement of tolerance to high temperature (barley). BR exogenous treatment increases the efficiency of the photosynthetic light reactions under various temperature conditions (winter rye, barley, rice), but interestingly, BR mutants with disturbances in BR biosynthesis are also characterized by an increased efficiency of PSII (barley). BR regulate the sugar metabolism including an increase in the sugar content, which is of key importance for acclimation, especially to low temperatures (winter rye, barley, maize). BR either participate in the temperature-dependent regulation of fatty acid biosynthesis or control the processes that are responsible for the transport or incorporation of the fatty acids into the membranes, which influences membrane fluidity (and subsequently the tolerance to high/low temperatures) (barley). BR may be one of the players, along with gibberellins or ABA, in acquiring tolerance to temperature stress in cereals (particularly important for the acclimation of cereals to low temperature).

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Brassinosteroid action and its relation with heat stress mechanisms in plants

Cited by 8 publications

References 52 publications

HSP Transcript and Protein Accumulation in Brassinosteroid Barley Mutants Acclimated to Low and High Temperatures

HSP Transcript and Protein Accumulation in Brassinosteroid Barley Mutants Acclimated to Low and High Temperatures

The Metabolic Basis of Pollen Thermo-Tolerance: Perspectives for Breeding

Brassinosteroids and the Tolerance of Cereals to Low and High Temperature Stress: Photosynthesis and the Physicochemical Properties of Cell Membranes

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