Dynamic changes in the starch-sugar interconversion within plant source and sink tissues promote a better abiotic stress response

Dong, Shaoyun; Beckles, Diane M.

doi:10.1016/j.jplph.2019.01.007

Cited by 269 publications

(186 citation statements)

References 197 publications

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“…These environments often alter plants' ability to assimilate, partition, allocate, and store carbohydrates [2][3][4]. When photosynthetic efficiency is inhibited by adverse conditions, the sugars produced may be insufficient to drive normal growth [5], and if the stressful conditions progress, the cellular sugar content may become exhausted to levels lower than those needed for sustenance [6,7].…”

Section: Introductionmentioning

confidence: 99%

A Cytosolic Protein Kinase STY46 in Arabidopsis thaliana Is Involved in Plant Growth and Abiotic Stress Response

Dong

Zhang

Beckles

2020

Plants

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Starch provides plants with carbon and energy during stressful periods; however, relatively few regulators of starch metabolism under stress-induced carbon starvation have been discovered. We studied a protein kinase Ser/Thr/Tyr (STY) 46, identified by gene co-expression network analysis as a potential regulator of the starch starvation response in Arabidopsis thaliana. We showed that STY46 was induced by (1) abscisic acid and prolonged darkness, (2) by abiotic stressors, including salinity and osmotic stress, and (3) by conditions associated with carbon starvation. Characterization of STY46 T-DNA knockout mutants indicated that there was functional redundancy among the STY gene family, as these genotypes did not show strong phenotypes. However, Arabidopsis with high levels of STY46 transcripts (OE-25) grew faster at the early seedling stage, had higher photosynthetic rates, and more carbon was stored as protein in the seeds under control conditions. Further, OE-25 source leaf accumulated more sugars under 100 mM NaCl stress, and salinity also accelerated root growth, which is consistent with an adaptive response. Salt-stressed OE-25 partitioned 14C towards sugars and amino acids, and away from starch and protein in source leaves. Together, these findings suggested that STY46 may be part of the salinity stress response pathway that utilizes starch during early plant growth.

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Section: Introductionmentioning

confidence: 99%

A Cytosolic Protein Kinase STY46 in Arabidopsis thaliana Is Involved in Plant Growth and Abiotic Stress Response

Dong

Zhang

Beckles

2020

Plants

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“…International Journal of Agronomy Umsila has maintained a better photosynthetic system under salinity than the susceptible cultivar Zabad as reflected by the relevant parameters measured in this study. In fact, maintaining the production of photosynthates such as starch is a natural abiotic response of various salt-tolerant plants [48]. ese photosynthates provide an essential source of energy, which is required to combat the harsh conditions and may also transform into smaller molecules while moving toward the sink and, hence, serve as osmolytes that can help plants maintain osmotic potential [48].…”

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confidence: 99%

Comparative Water Relations of Two Contrasting Date Palm Genotypes under Salinity

Kharusi

Sunkar

Al-Yahyai

et al. 2019

International Journal of Agronomy

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Salinity is a global agricultural problem, resulting in a significant reduction in the plantation areas and the crop yields, especially in arid and semiarid regions. The date palm is relatively salt-tolerant plant species, although the nature of salt tolerance is poorly understood. In this study, the salt stress responses of a salt-tolerant “Umsila” was compared with salt-susceptible “Zabad” date palm cultivars. Various physiological parameters, plant-water relations, and anatomical characteristics were analyzed. The results revealed that although salinity has negatively affected both cultivars, Umsila exhibited more stable photosynthesis than Zabad as reflected by the quantum yield (Qy) and the stomatal conductance (GS). Similarly, Umsila showed a more dynamic root system and efficient water relations than Zabad as demonstrated by the leaf water potential (LWP) and relative water content (RWC) during salinity. Umsila also accumulated greater abundances of soluble sugars, potassium (K+), calcium (Ca+2), proline, glycine betaine, and lignin and formed extra layers of Casparian strips in the root tissues when the seedlings were grown under saline conditions. Together, the results obtained from this study have offered some insights into the salt tolerance mechanisms in the date palm.

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“…Basu, Shivhare, Singh, and Beniwal () also worked on the physiochemical properties of mango fruits by the application of edible coating and showed that during storage period total soluble content increased due to polysaccharide depolymerization. Dong and Beckles () did similar work on tomatoes and observed that storage conditions have a direct relationship on TSS. Increase in TSS might be due to degradation of carbohydrates and starch in the guava fruit to fulfill their energy desire.…”

Section: Resultsmentioning

confidence: 92%

Formulation of date pit oil‐based edible wax coating for extending the storage stability of guava fruit

Ahmed

Ali

Imran

et al. 2019

J Food Process Preserv

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The study was planned to formulate edible wax coating by utilizing date pit oil. Date pit oil was extracted from three date varieties (Aseel, Hallawi, and Dhakki) through solvent extraction method. One variety was selected on the basis of physicochemical analysis of date pit oil. The different treatments (T1, T2, T3, and T4) of wax coating were formulated by replacing water in standard wax formulation with date pit oil as 0.5%, 1%, 1.5%, and 2%, respectively. The storage studies were carried out for 16 days; different fruit parameters like pH, weight loss, total soluble solids (TSS), titratable acidity, fruit firmness, and vitamin C content were studied. Results indicated significant improvement in the shelf life of coated guava fruits as compared to uncoated guava fruits.T4 showed highest keeping quality as compared to T3, T2, and T1. Practical applications This research work is novel in the field of edible coating by using date pit oil as natural barrier against environmental factors affecting the shelf life of guava fruit. There is immense potential in this new commodity to explore more applications of promising importance. Moreover, this study can be replicated for other fruits and vegetables to curtail postharvest losses and supplementing economic benefits.

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Dynamic changes in the starch-sugar interconversion within plant source and sink tissues promote a better abiotic stress response

Cited by 269 publications

References 197 publications

A Cytosolic Protein Kinase STY46 in Arabidopsis thaliana Is Involved in Plant Growth and Abiotic Stress Response

A Cytosolic Protein Kinase STY46 in Arabidopsis thaliana Is Involved in Plant Growth and Abiotic Stress Response

Comparative Water Relations of Two Contrasting Date Palm Genotypes under Salinity

Formulation of date pit oil‐based edible wax coating for extending the storage stability of guava fruit

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