Potassium-induced freezing tolerance is associated with endogenous abscisic acid, polyamines and soluble sugars changes in grapevine

2017 ◽  
Vol 215 ◽  
pp. 184-194 ◽  
Author(s):  
Rouhollah Karimi
Keyword(s):  
Abscisic Acid ◽  
Freezing Tolerance ◽  
Soluble Sugars ◽  
Endogenous Abscisic Acid

scholarly journals Abscisic acid content during cold hardening of barley and wheat cultivars with different freezing toler

2011 ◽  
Vol 48 (No. 11) ◽  
pp. 490-493
Author(s):  
Z. Faltusová-Kadlecová ◽  
M. Faltus ◽  
I. Prášil
Keyword(s):  
Abscisic Acid ◽  
Freezing Tolerance ◽  
Acid Content ◽  
The Other ◽  
Cold Hardening ◽  
Wheat Cultivars ◽  
Endogenous Abscisic Acid ◽  
Significant Change ◽  
Hydroponically Grown ◽  
Abscisic Acid Content

Endogenous content of abscisic acid was studied in a set of two winter cultivars of barleys (Lunet, Cenader), one spring cultivar (Akcent) and five winter cultivars of wheat (Mironovská, Samanta, Šárka, Zdar, Apache) and one spring cultivar (Leguan) in the course of cold hardening of hydroponically grown plants. Freezing tolerance was also determined in all barley and wheat cultivars under study. In none of the barley varieties did cold hardening of plants induce any significant change in abscisic acid content. In wheat plants exposed to cold hardening, the cultivars Apache and Leguan showed a slight transitory increase in abscisic acid content. Abscisic acid content in leaves was very similar in the other wheat cultivars. Neither in barley nor in wheat was the level of freezing tolerance associated with endogenous abscisic acid content or with its transitory changes during cold hardening.

scholarly journals Physiological and Biochemical Processes of Magnolia wufengensis in Response to Foliar Abscisic Acid Application during Natural Cold Acclimation

HortScience ◽  
2015 ◽  
Vol 50 (3) ◽  
pp. 387-394 ◽  
Author(s):  
Yang Yang ◽  
Zhongkui Jia ◽  
Faju Chen ◽  
Ziyang Sang ◽  
Luyi Ma
Keyword(s):  
Abscisic Acid ◽  
Cold Acclimation ◽  
Freezing Tolerance ◽  
Foliar Application ◽  
Soluble Sugars ◽  
Northern China ◽  
Freezing Injury ◽  
Exogenous Aba ◽  
Physiological And Biochemical ◽  
Magnolia Wufengensis

The rare species Magnolia wufengensis frequently suffers from freezing injury in northern China. To investigate the influence of exogenous abscisic acid (ABA) application on the natural cold acclimation of M. wufengensis, physiological and biochemical changes in field-grown M. wufengensis seedlings subjected to foliar ABA treatments at four concentrations (0, 300, 600, and 900 mg·L−1) were evaluated from Sept. 2012 to Jan. 2013. The optimum foliar application concentrations of ABA for M. wufengensis were between 600 and 900 mg·L−1, which led to faster shoot growth cessation, leaf senescence, and development rates of bud endodormancy level and shoot freezing tolerance. The improved freezing tolerance under exogenous ABA application was associated with promoted dehydration and accumulation of proline, soluble protein, and certain soluble sugars such as glucose and fructose. Foliar ABA treatments initiated a cascade of steps for advancing the cold acclimation process of M. wufengensis. We suggest that exogenous ABA application may be used on M. wufengensis grown in northern China, where there are short growing seasons and early fall frost events.

scholarly journals The Halophyte Halostachys caspica AP2/ERF Transcription Factor HcTOE3 Positively Regulates Freezing Tolerance in Arabidopsis

2021 ◽  
Vol 12 ◽  
Author(s):  
Fangliu Yin ◽  
Youling Zeng ◽  
Jieyun Ji ◽  
Pengju Wang ◽  
Yufang Zhang ◽  
...  
Keyword(s):  
Transcription Factor ◽  
Abscisic Acid ◽  
Freezing Tolerance ◽  
Critical Role ◽  
Extreme Temperature ◽  
Freezing Stress ◽  
Antioxidant Enzyme Activities ◽  
Transcription Factor Gene ◽  
Factor Gene ◽  
Halostachys Caspica

The APETALA2 (AP2) and ethylene-responsive element-binding factor (ERF) gene family is one of the largest plant-specific transcription factor gene families, which plays a critical role in plant development and evolution, as well as response to various stresses. The TARGET OF EAT3 (TOE3) gene is derived from Halostachys caspica and belongs to the AP2 subfamily with two AP2 DNA-binding domains. Currently, AP2 family mainly plays crucial roles in plant growth and evolution, yet there are few reports about the role of AP2 in abiotic stress tolerance. Here, we report HcTOE3, a new cold-regulated transcription factor gene, which has an important contribution to freezing tolerance. The main results showed that the expression of HcTOE3 in the H. caspica assimilating branches was strongly induced by different abiotic stresses, including high salinity, drought, and extreme temperature (heat, chilling, and freezing), as well as abscisic acid and methyl viologen treatments. Overexpressing HcTOE3 gene (OE) induced transgenic Arabidopsis plant tolerance to freezing stress. Under freezing treatment, the OE lines showed lower content of malondialdehyde and electrolyte leakage and less accumulation of reactive oxygen species compared with the wild type. However, the survival rates, antioxidant enzyme activities, and contents of osmotic adjustment substance proline were enhanced in transgenic plants. Additionally, the OE lines increased freezing tolerance by up-regulating the transcription level of cold responsive genes (CBF1, CBF2, COR15, COR47, KIN1, and RD29A) and abscisic acid signal transduction pathway genes (ABI1, ABI2, ABI5, and RAB18). Our results suggested that HcTOE3 positively regulated freezing stress and has a great potential as a candidate gene to improve plant freezing tolerance.

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