Influence of Exogenous Glycine Betaine and Abscisic Acid on Papaya in Responses to Water-deficit Stress

Mahouachi, Jalel; Argamasilla, Rosa; Gómez-Cádenas, Aurelio

doi:10.1007/s00344-011-9214-z

Cited by 57 publications

(37 citation statements)

References 45 publications

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“…RD43 (80.73% reduction) and SPR1 (85.82% reduction) but it was stabilized in 100 mM GlyBet pretreated plants. Similar results of P n stabilization under drought stress using exogenous GlyBet application in papaya [52], tobacco [50], cotton [19], and wheat [47] have been reported. In addition, a positive relation between physiological data and panicle weight of rice cvs.…”

Section: Figuresupporting

confidence: 82%

“…In papaya cv. BH-65, free proline in the leaves of 18 d water deficit stress was recorded to be the maximum, but it was subsequently decreased by re-watering and repressed by GlyBet pretreatment [52]. Similarly, free proline in tobacco cvs.…”

Section: Figurementioning

confidence: 91%

“…In papaya cv. BH-65, the number of leaves was a very sensitive trait responding strongly to 18 d water deficit stress and declining by 65.27% to that of well watering (control), while it was improved by 50 mM GlyBet treatment (only 39.16% reduction to that of control) [52]. Moreover, plant height, number of leaves and leaf area of tomato cv.…”

Section: Overall Growth Performances and Yield Traitsmentioning

confidence: 93%

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Exogenous Foliar Application of Glycine Betaine to Alleviate Water Deficit Tolerance in Two Indica Rice Genotypes under Greenhouse Conditions

et al. 2019

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The aim of this investigation was to enhance overall growth, yield attributes as well as physio-biochemical adaptive strategies by exogenous foliar application of glycine betaine (GlyBet) in two rice varieties against water deficit stress under greenhouse conditions. Rice crop cvs. RD43 (low amylose content) and SPR1 (high amylose content) grown in clay pots containing garden soil until booting stage were chosen as the test plant material, sprayed by 0 (control) or 100 mM GlyBet and subsequently subjected to: MWD (mild water deficit by 8 d water withholding; 24.80% SWC; Soil water content) or SWD (severe water deficit by 14 d water withholding; 13.63% SWC) or WW (well-watered conditions or control). Free proline content in cv. RD43 was rapidly increased in relation to the degree of water deficit and suppressed by exogenous GlyBet, while free proline in cv. SPR1 was lower than cv. RD43. Overall growth performances and yield traits in both cultivars under MWD were maintained by exogenous application of GlyBet; however, these parameters declined under SWD even after the GlyBet application. Degradation of photosynthetic pigments and chlorophyll fluorescence in pretreated GlyBet plants under SWD were prevented, resulting in elevated net photosynthetic rate (Pn). Interestingly, Pn was very sensitive parameter that sharply declined under SWD in both RD43 and SPR1 genotypes. Positive relationships between physio-morphological and biochemical changes in rice genotypes were demonstrated with high correlation co-efficiency. Based on the key results, it is concluded that foliar GlyBet application may play an important role in drought-tolerant enhancement in rice crops.

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Section: Figuresupporting

confidence: 82%

Section: Figurementioning

confidence: 91%

Section: Overall Growth Performances and Yield Traitsmentioning

confidence: 93%

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Exogenous Foliar Application of Glycine Betaine to Alleviate Water Deficit Tolerance in Two Indica Rice Genotypes under Greenhouse Conditions

et al. 2019

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“…Generally, Glycinebetaine protected the plant cells against the adverse affects of stress by (i) preserving the osmotic balance (Mahouachi et al, 2012) (ii) stabilizing the structure of macromolecules and maintaining membrane permeability (Ashraf and Foolad, 2007) (iii) protecting the photosynthetic apparatus and promoting the photosynthetic capacity (Allakhverdiev et al, 2003) and (iv) enhancing antioxidant enzyme activities, and acting as radical oxygen scavengers .…”

Section: Physiological Role Of Gbmentioning

confidence: 99%

Influence of osmoregulators on plant tolerance to water stress

2016

Sci. Agric

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CitationDawood MG. 2016. Influence of osmoregulators on plant tolerance to water stress, 13 (1), 42-58. Retrieved from www.pscipub.com (DOI: 10.15192/PSCP. SA.2016.13.1.4258) This article highlights on some recent researches, which studied the impact of osmoregulator compounds and their application on the plant in order to increase the plant tolerance to water stress. Water stress limits the growth, productivity and quality of agricultural crops in the world. Water Stress is not only due to the scarcity of water but also due other factors such as salinity, high temperatures and severe cold that make plants not able to absorb enough water from soil to grow well and this is called physiological drought that leads to a series of disorders in physiological and biochemical processes mainly due to lack of osmotic (internal water content of the plant deficiency), and the toxicity of salt ions. One way to overcome the negative impact of water stress on plants is the use of osmoregulators compounds formed by the plant when exposed to stress such as glycinebetaine, proline and trehalose. Osmoregulator compounds mainly regulate osmotic pressure within the plant to be able to absorb water and also have influential and effective roles on a lot of vital processes in the plant. they protect membranes of chloroplasts and thus increase the photosynthesis efficiency and have the ability to protect cell walls and membranes, which leads to stability and the organization of permeability and play an important role in scavenging the free radicals thus lead to mitigate the adverse impact of stress and improve growth, productivity and quality of plants. It can be concluded from this article that the best material used to increase plant tolerance to water stress is glycinebetaine where it can be obtained in large quantities and at low prices, making use it appropriately in economic terms as well as effective impact on increasing the tolerance of plants to water stress and reflected in increasing crop quantity and quality. Moreover, the use of proline has also an influential and effective role in increasing plant tolerance to water stress, but more expensive than glycinebetaine. Trehalose is an efficient protectant against water deficit conditions, and it is also effective in reducing oxidative stress but trehalose considered the most expensive, until now. We must intensify efforts to study and understand more of the physiological and biochemical changes played by these substances within the plant under stress conditions to improve plant productivity under water stress with modest economic cost.

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“…As important endogenous hormone in plants, ABA can promote the abscission of flowers, leaves and fruits and the maturation and dormancy of seeds, regulate stomatal movement and blossom, inhibit growth and accelerate senescence in the process of plant growth and development (Addicott et al 1968;Rohde et al 2000;Song et al 2011). Moreover, ABA can improve the tolerance of plants under drought, temperature, high salt, heavy metals and other stresses, so it is also called stress hormone (Khadri et al 2007;Larkindale and Knight 2002;Mahouachi et al 2012;Meng et al 2008). Different studies on ABA in plants response to pathogens have contrasting conclusions (Maksimov 2009).…”

Section: Introductionmentioning

confidence: 99%

Identification of tRFs and phasiRNAs in tomato (Solanum lycopersicum) and their responses to exogenous abscisic acid

Luan

Dai

et al. 2019

Preprint

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Background: The non-coding small RNA tRFs (tRNA-derived fragments) and phasiRNAs (plant-specific) exert important roles in plant growth, development and stress resistances. However, whether the tRFs and phasiRNAs respond to the plant important stress hormone abscisic acid (ABA) remain enigma. Results: Here, the RNA-sequencing was implemented to decipher the landscape of tRFs and phasiRNAs in tomato (Solanum lycopersicum) leaves and their responses when foliar spraying exogenous ABA after 24 hrs. In total, 733 tRFs and 137 phasiRNAs were detected. The tRFs were mainly derived from the tRNAAla transporting alanine, which tended to be cleaved at the 5，terminal guanine site and D loop uracil site to produce tRFAla with length of 20 nt. Most of phasiRNAs originated from NBS-LRR resistance genes. Expression analysis revealed that 156 tRFs and 68 phasiRNAs expressed differentially, respectively. Generally, exogenous ABA mainly inhibited the expression of tRFs and phasiRNAs. Furthermore, integrating analysis of target gene prediction and transcriptome data presented that ABA significantly downregulated the abundance of phsaiRNAs associated with biological and abiotic resistances. Correspondingly, their target genes such as AP2/ERF, WRKY and NBS-LRR, STK and RLK, were mainly up-regulated. Conclusions: Combined with the previous analysis of ABA-response miRNAs, it was speculated that ABA can improve the plant resistances to various stresses by regulating the expression and interaction of small RNAs (such as miRNAs, tRFs, phasiRNAs) and their target genes. This study enriches the plant tRFs and phasiRNAs, providing a vital basis for further investigating ABA response- tRFs and phasiRNAs and their functions in biotic and abiotic stresses.

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Influence of Exogenous Glycine Betaine and Abscisic Acid on Papaya in Responses to Water-deficit Stress

Cited by 57 publications

References 45 publications

Exogenous Foliar Application of Glycine Betaine to Alleviate Water Deficit Tolerance in Two Indica Rice Genotypes under Greenhouse Conditions

Exogenous Foliar Application of Glycine Betaine to Alleviate Water Deficit Tolerance in Two Indica Rice Genotypes under Greenhouse Conditions

Influence of osmoregulators on plant tolerance to water stress

Identification of tRFs and phasiRNAs in tomato (Solanum lycopersicum) and their responses to exogenous abscisic acid

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