Effect of Restricted Root Growth on Carbohydrate Metabolism and Whole Plant Growth of <i>Cucumis sativus</i> L.

Robbins, N. Suzanne; Pharr, D. M.

doi:10.1104/pp.87.2.409

Cited by 121 publications

(75 citation statements)

References 11 publications

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“…The explanation reside in the small dimension of particle which determine a slowly flow of the nutrient solutions and especially reduced capacity of absorption and aeration. A similar conclusion was obtained by Robbins and Pharr in a study regarding the influence of container volumes on growth of cucumber plants (Robbins & Pharr, 1988).…”

Section: Discussionsupporting

confidence: 68%

“…Also, and in the case of fruits the highest content was found in fruits of plants grown on Perlite 5 mm followed by in those grown on Jiffy. The lowest chlorophyll content of the whole plant, and especially in leaves was found in plants grown on Perlite 2 mm.The explanation of this phenomenon could be considered the reduced aeration capacity of this substrate in the root areas (Robbins & Pharr, 1988).…”

Section: Discussionmentioning

confidence: 99%

“…One problem that sometimes occurs in soilless cucumber culture is the lack of sufficient oxygen due to the reduced culture vessel volume and is manifested by restricted root growth with a possible increased the starch concentrations along with a reduction of reducing sugars biosynthesis in cucumber leaves (Robbins & Pharr, 1988).…”

Section: Importance Of Cucumber Soilless Culturesmentioning

confidence: 99%

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Influence of Perlite and Jiffy Substrates on Cucumber Fruit Productivity and Quality

Petre¹,

Pele²,

Drăghici³

2015

JAS

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Most studies related to the culture of cucumbers refer only to germination, emergence and development of leaves and fruit, the nutrients used and their efficiency. This study assesses the influence of different types of soilless substrates (Perlite -2 mm, Perlite -4 mm, Perlite -5 mm, Jiffy and Jiffy + 50% Perlite -4 mm) on the content of nitrate, carbohydrates, chlorophyll, proteins, invertase activity and dry matter in cucumber leaves, stems and fruit grown on the respective substrates. The highest production was obtained on Perlite -4 mm. The nitrates content was below the maximum admitted limit for all samples. Dry matter content of fruit depended on substrate in succession Jiffy, Perlite -5 mm, Perlite 4 mm, Perlite 2 mm and Jiffy+Perlite 4 mm. The highest content of total chlorophyll was both in leaves as well as relating to fruit of plants grown on Perlite 5mm. The protein concentrations in fruits decrease in the order Jiffy, Perlite -4 mm, Perlite -5 mm, Perlite -2 mm and Jiffy+Perlite -4 mm. Both carbohydrates and invertase activity have the highest values in fruits. When, reducing sugars content is very high invertase activity corresponding is low. The highest level of reducing sugars was found in fruits grown on Jiffy followed by those developed on Perlite -2 mm. Although, Jiffy substrate shows very good results it is expensive so the best choice for growing cucumbers in terms of both production and nutrient content is mainly the Perlite -4 mm substrate.

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Section: Discussionsupporting

confidence: 68%

Section: Discussionmentioning

confidence: 99%

Section: Importance Of Cucumber Soilless Culturesmentioning

confidence: 99%

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Influence of Perlite and Jiffy Substrates on Cucumber Fruit Productivity and Quality

Petre¹,

Pele²,

Drăghici³

2015

JAS

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“…3 and 4). Starch accumulation induced by limited sink activity has been reported in Cucumis sativus L. (Robbins and Pharr, 1988) and grape vine (Kubota and Shimamura, 1989); moreover, Flore and Layne (1999) indicated that accumulation of carbohydrates is caused by limiting sink activity under water-stress conditions. Loescher et al (1990) found that when sweet cherry undergoes deficit irrigation, its carbohydrate reserves increase, especially in the roots.…”

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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“…For free amino acid determination and Soluble carbohydrates using 50 mg of fresh leaf tissue for the preparation of the ethanol extract (Robbins and Pharr, 1988;Trethwey et al, 1998). Soluble carbohydrates were determined according to Dubois et al (1956), using d(+)-glucose as standard.…”

Section: Leaf Soluble Sugars Free Amino Acids Proteins and Total Nimentioning

confidence: 99%

Leaf Photosynthetic Metabolism and N2 Fixation at the Flowering Stage in Three Genotypes of Cowpea [Vigna unguiculata (L.) Walp.]

Oliveira¹,

Benko‐Iseppon²,

Kido³

et al. 2012

JAS

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Biological nitrogen fixation (BNF) in cultivars of cowpea is not yet understood. The hypothesis proposed by this study is that lack of basic technology, including sufficient mineral nutrition, combined with periods of water shortage during the crop cycle leads to insufficient photosynthetic metabolism in the flowering stage in nodulated plants. Two experiments were conducted in northeastern Brazil, one under field conditions and another in a greenhouse at near optimal conditions. Two of the principal cultivars selected for northeastern (Mulato and Gurguéia) and one for northern Brazil (Milênio) were evaluated regarding physiological, biochemical and biometric variables between the late vegetative and early reproductive stages under mineral nutrition and BNF treatments. Gas exchanges, chlorophyll fluorescence and leaf contents of soluble sugars, amino acids, proteins and chlorophyll of inoculated plants were similar to plants fertilized with mineral nitrogen, in the three cultivars in both experiments, with emphasis on Gurguéia. Leaf nitrogen concentrations and the number and dry weight of nodules were higher in Mulato and Gurguéia compared to Milênio. Milênio and Gurguéia under BNF showed higher total dry weight compared to controls; however, the number of pods per plant was higher in inoculated plants compared to controls. In conclusion, based on these results under non-stressful conditions, cultivars selected for the northeastern region inoculated with an effective rhizobia strain and receiving a mild dose of mineral nitrogen can ensure development similar to that verified in plants fertilized only with correct nitrogen fertilization.

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Effect of Restricted Root Growth on Carbohydrate Metabolism and Whole Plant Growth of Cucumis sativus L.

Abstract: The effects of varied rooting volumes on root growth and source leaf carbohydrate metabolism were studied in greenhouse-grown cucumber (Cucumis sativus L cv Calypso) plants. Plants

Cited by 121 publications

References 11 publications

Influence of Perlite and Jiffy Substrates on Cucumber Fruit Productivity and Quality

Influence of Perlite and Jiffy Substrates on Cucumber Fruit Productivity and Quality

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

Leaf Photosynthetic Metabolism and N2 Fixation at the Flowering Stage in Three Genotypes of Cowpea [Vigna unguiculata (L.) Walp.]

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