Effect of drought on sorbitol and sucrose metabolism in sinks and sources of peach

Bianco, Riccardo Lo; Rieger, Mark; Sung, Shi-Jean S.

doi:10.1034/j.1399-3054.2000.108001071.x

Cited by 115 publications

(82 citation statements)

References 39 publications

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“…Sorbitol transport, an important cell osmotic potential regulator, is performed by the protein product of GmSTP. Sorbitol accumulation in mature leaves and roots during water deficit can constitute 80% of the total solutes involved in osmotic adjustment (Bianco et al, 2000).…”

Section: Discussionmentioning

confidence: 99%

Molecular, anatomical and physiological properties of a genetically modified soybean line transformed with rd29A:AtDREB1A for the improvement of drought tolerance

Polizel¹,

Medri²,

Nakashima³

et al. 2011

Genet. Mol. Res.

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ABSTRACT. We evaluated the molecular, anatomical and physiological properties of a soybean line transformed to improve drought tolerance with an rd29A:AtDREB1A construct. This construct expressed dehydrationresponsive element binding protein DREB1A from the stress-inducible rd29A promoter. The greenhouse growth test included four randomized blocks of soybean plants, with each treatment performed in triplicate. Seeds from the non-transformed soybean cultivar BR16 and from the genetically modified soybean P58 line (T 2 generation) were grown at 15% gravimetric humidity for 31 days. To induce water deficit, the humidity was reduced to 5% gravimetric humidity (moderate stress) for 29 days and then to 2.5% gravimetric humidity (severe stress). AtDREB1A gene expression was higher in the genetically modified P58 plants during water deficit, demonstrating transgene stability in T 2 generations and induction of the rd29A promoter. Drought-response genes, including GmPI-PLC, GmSTP, GmGRP, and GmLEA14, were highly expressed in plants submitted to severe stress. Genetically modified plants had higher stomatal conductance and consequently higher photosynthetic and transpiration rates. In addition, they had more chlorophyll. Overexpression of AtDREB1A may contribute to a decrease in leaf thickness; however, a thicker abaxial epidermis was observed. Overexpression of AtDREB1A in soybean appears to enhance drought tolerance.

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Section: Discussionmentioning

confidence: 99%

Molecular, anatomical and physiological properties of a genetically modified soybean line transformed with rd29A:AtDREB1A for the improvement of drought tolerance

Polizel¹,

Medri²,

Nakashima³

et al. 2011

Genet. Mol. Res.

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“…of the initiation time of drought stress on carbohydrate metabolism and vegetative growth in the Japanese apricot 'Nanko' tree. Sugar accumulation under drought stress conditions for osmotic adjustment is recognized in some fruit trees, for example, in peach (Bianco et al, 2003), Satsuma mandarin (Yakushiji et al, 1998), and apple (Wang and Stutte, 1992). In general, in the sugar accumulation process, starch degradation occurs by conversion to sugars (Vaadia et al, 1961).…”

Section: Discussionmentioning

confidence: 99%

Effect of Initiation Timing of Drought Stress on Carbohydrate Content and Vegetative Growth in Japanese Apricot (Prunus mume Sieb. et Zucc.) ‘Nanko’

Tsuchida

Negoro

Hishiike

2011

J. Japan. Soc. Hort. Sci.

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The effects of initiation timing of drought stress on the carbohydrate content and growth of Japanese apricot (Prunus mume Sieb. et Zucc.) 'Nanko' tree were investigated. Three-year-old trees were subjected to drought stress for three months in May ('Spring') and August ('Summer'), respectively. Irrigation was started immediately after drought stress treatment had finished. The starch concentration in the roots of stressed trees increased in both 'Spring' and 'Summer' two months after starting drought stress treatment and rapidly decreased just after starting irrigation in 'Spring'; however, it still temporarily increased in 'Summer'. These different results were attributed to seasonal changes in the carbohydrate demand. The dry matter weight of each tree organ in February of the following year was suppressed by drought stress, particularly in 'Spring'. This result indicates that, if a tree suffers drought stress in spring, vegetative growth is suppressed more seriously than in summer and tree growth, declined by suffering from severe and long-term drought stress, will hardly recover even the tree is reirrigated. The total starch in all organs of the drought-stressed trees in February of the following year was significantly less than that in well-irrigated trees. These results indicate that severe drought stress for three months inhibits not only current tree growth but also the accumulation of carbohydrates that is necessary for the following year's growth. Hence, irrigation to avoid a fatal growth decline due to severe drought stress is needed during the current growth stage, especially in the early growth stage in spring.

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“…The activity and mRNA level of S6PDH in apple leaves increased with a low temperature or salt stress . The activity of NAD-SDH and S6PDH in peach leaves decreased during drought (Lo Bianco et al, 2000).…”

Section: Metabolic Conversion Of Translocation Sugars In Fruitmentioning

confidence: 96%

Metabolism and Accumulation of Sugars Translocated to Fruit and Their Regulation

Yamaki

2010

J. Japan. Soc. Hort. Sci.

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Photoassimilates needed for fruit development are supplied from leaves, converted in fruit to substances relating to the specific quality of the fruit, then accumulate in the fruit. There are various regulation steps in the process from photoassimilate synthesis in leaves to sugar accumulation in fruit: photosynthesis, synthesis of translocation sugars, loading of translocation sugars, their translocation, their unloading, their membrane transport, their metabolic conversion, and compartmentation in vacuoles. Thus, it is important to clarify the mechanism and regulation of each step in fruit development. In this review, mainly the metabolic conversion of translocation sugars and their regulation at the genetic level in fruit are described because the metabolic conversion in fruit contributes greatly to produce the sink activity needed for fruit development.

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Effect of drought on sorbitol and sucrose metabolism in sinks and sources of peach

Cited by 115 publications

References 39 publications

Molecular, anatomical and physiological properties of a genetically modified soybean line transformed with rd29A:AtDREB1A for the improvement of drought tolerance

Molecular, anatomical and physiological properties of a genetically modified soybean line transformed with rd29A:AtDREB1A for the improvement of drought tolerance

Effect of Initiation Timing of Drought Stress on Carbohydrate Content and Vegetative Growth in Japanese Apricot (Prunus mume Sieb. et Zucc.) ‘Nanko’

Metabolism and Accumulation of Sugars Translocated to Fruit and Their Regulation

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