Carbohydrate Depletion during Lethal Infestation ofAulacaspis yasumatsuionCycas revoluta

2018 ◽  
Vol 179 (6) ◽  
pp. 497-504 ◽  
Author(s):  
Thomas E. Marler ◽  
April N. J. Cascasan
Keyword(s):  
Carbohydrate Depletion

scholarly journals Carbohydrate Depletion and Leaf Blackening in Protea neriljiolia

1991 ◽  
Vol 116 (6) ◽  
pp. 1019-1024 ◽  
Author(s):  
Robyn McConchie ◽  
N. Suzanne Lang ◽  
Ken C. Gross
Keyword(s):  
Sink Strength ◽  
Cut Flower ◽  
Continuous Darkness ◽  
Primary Stress ◽  
Leaf Carbohydrates ◽  
Carbohydrate Depletion ◽  
Sink Demand ◽  
And Storage ◽  
Exogenous Sugar ◽  
Storage Reserves

Leaf blackening on cut flower Protea nerii[olia R. Br. stems was dramatically reduced under a 12-hour photosynthetic light period (120 μmol·m-2·s-1) at 25C for 15 days compared with stems kept in the dark. In the light, addition of 0.5% exogenous sugar to the vase solution resulted in a maximum of 2.5% leaf blackening, while stems with no exogenous sugar had a maximum of 16.5%. Continuous darkness resulted in 94% leaf blackening by day 7, irrespective of sugar treatment. Starch and sucrose concentrations were markedly lower in leaves on dark-held stems than in leaves on stems held in the light; thus, carbohydrate depletion could be the primary stress that initiates leaf blackening. In the light, rates of carbon exchange and assimilate export were similar, indicating that the amount of carbon fixed maybe regulated by sink demand. The pattern of carbon partitioning changed in light-held leaves of the 0% sugar treatment during rapid floral expansion and senescence. Inflorescence expansion appears to influence partitioning of photoassimilates and storage reserves into transport carbohydrates; under decreased sink demand, the assimilate export rate decreases and photoassimilates are partitioned into starch. The data suggest that sink strength of inflorescences held in darkness may be responsible for the depletion of leaf carbohydrates and. consequently, blackening.

scholarly journals Plant carbohydrate depletion impairs water relations and spreads via ectomycorrhizal networks

2020 ◽  
Author(s):  
Gerard Sapes ◽  
Patrick Demaree ◽  
Ylva Lekberg ◽  
Anna Sala
Keyword(s):  
Water Relations ◽  
Carbohydrate Depletion

scholarly journals Trends in Carbohydrate Depletion, Respiratory Carbon Loss, and Assimilate Export from Soybean Leaves at Night

1988 ◽  
Vol 86 (2) ◽  
pp. 517-521 ◽  
Author(s):  
Jeffrey A. Mullen ◽  
H. Ronald Koller
Keyword(s):  
Carbon Loss ◽  
Carbohydrate Depletion ◽  
Respiratory Carbon Loss ◽  
Soybean Leaves

scholarly journals Nitrogen remobilisation facilitates adventitious root formation on reversible dark-induced carbohydrate depletion in Petunia hybrida

2016 ◽  
Vol 16 (1) ◽  
Author(s):  
Siegfried Zerche ◽  
Klaus-Thomas Haensch ◽  
Uwe Druege ◽  
Mohammad-Reza Hajirezaei
Keyword(s):  
Adventitious Root ◽  
Petunia Hybrida ◽  
Root Formation ◽  
Adventitious Root Formation ◽  
Carbohydrate Depletion ◽  
Nitrogen Remobilisation

scholarly journals 023 USE OF GROWTH REGULATORS TO DELAY FOLIAR CHLOROSIS ON EXCISED EASTER LILY LEAVES

HortScience ◽  
1994 ◽  
Vol 29 (5) ◽  
pp. 430g-431
Author(s):  
Susan S. Han
Keyword(s):  
Respiration Rate ◽  
Growth Regulators ◽  
Cold Storage ◽  
Foliar Application ◽  
Rapid Development ◽  
Fresh Weight ◽  
Rapid Loss ◽  
Easter Lily ◽  
Carbohydrate Depletion ◽  
Effective Development

Yellowing of excised Easter lily leaves was significantly delayed by foliar application of gibberellic acids (GA3) ≥ 250 mg·1-1 or benzyladenine (BA) ≥ 50 mg·1-1. Rapid development of foliar chlorosis following cold storage was delayed significantly by applying 500 mg·1-1 of GA3 or BA before storage. Post-storage treatments were less effective. Development of chlorosis was associated with rapid loss of fresh weight and was not related to the aperture of the stomates. Respiration rate of leaves treated with growth regulators were significantly lower than that of the controls. Differences in the rate of carbohydrate depletion may explain the striking effects of growth regulators on the development of foliar chlorosis.

scholarly journals Role of Ethylene in Opening and Senescence of Gladiolus sp. Flowers

1994 ◽  
Vol 119 (5) ◽  
pp. 1014-1019 ◽  
Author(s):  
Margrethe Serek ◽  
Rodney B. Jones ◽  
Michael S. Reid
Keyword(s):  
Ethylene Production ◽  
Synergistic Effects ◽  
Pulse Treatment ◽  
Fresh Weight ◽  
Flower Opening ◽  
Silver Thiosulfate ◽  
Ethylene Treatment ◽  
Cool Storage ◽  
Carbohydrate Depletion

The opening and senescence of gladiolus (Gladiolus sp.) florets was accompanied by climacteric or nonclimacteric patterns of respiration and ethylene production, depending on variety, and whether data were expressed on a fresh-weight or floret basis. A climacteric pattern of ethylene production by the youngest buds on the spike (which never opened) was stimulated by cool storage, and was not affected by holding the spikes in a preservative solution containing sucrose. Ethylene treatment had no effect on senescence of the florets of any of the cultivars tested. Pulse treatment of the spikes with silver thiosulfate (STS) improved floret opening but not the life of individual florets. Sucrose and STS had similar but not synergistic effects on floret opening, suggesting that STS improves flower opening in gladiolus by overcoming the effects of carbohydrate depletion.

scholarly journals ROLE OF CARBOHYDRATE DEPLETION AND ETHYLENE IN FLOWER BUD ABSCISSION OF HIBISCUS ROSA-SINENSIS L.

HortScience ◽  
1990 ◽  
Vol 25 (9) ◽  
pp. 1138g-1139 ◽  
Author(s):  
Barbara C. Poole ◽  
Terril A. Nell ◽  
James E. Barrett
Keyword(s):  
Starch Content ◽  
Soluble Sugars ◽  
Past Research ◽  
Causative Factor ◽  
Sink Strength ◽  
Flower Bud ◽  
Size Groups ◽  
Carbohydrate Depletion ◽  
Carbohydrate Levels ◽  
Source Sink

Premature flower bud abscission imposes a serious limitation on longevity of potted Hibiscus in interiorscape situations, Ethylene is known to be one causative factor. Past research has suggested that carbohydrate depletion of buds may also be involved,A series of experiments was conducted to examine the relationship between carbohydrate levels and ethylene sensitivity of flower buds under low irradiance levels. Two cultivars were used: `Pink Versicolor', which is very susceptible to bud abscission, and the more resistant `Vista', In the first experiment, plants were harvested twice weekly after placement in interiorscape rooms (8.5 μmol m-2 s-1 for 12 hrs per day; 26.5°C day/night) until all buds had abscissed. At each harvest, buds from four size groups were collected for analysis. In the second experiment, source/sink strength of buds was manipulated by selective daily removal of certain sized buds. Remaining buds were collected just prior to abscission for analysis. In two additional experiments, `Pink Versicolor' plants were treated with either silver thiosulfate or ethephon prior to placement in interiorscape rooms. Plants were harvested twice weekly and buds collected. For all experiments, bud dry wt, total soluble sugars and starch content were determined.

Carbohydrate depletion has profound effects on the muscle amino acid and glucose metabolism during hyperinsulinaemia

2001 ◽  
Vol 3 (2) ◽  
pp. 113-120 ◽  
Author(s):  
P. Ebeling ◽  
J. A. Tuominen ◽  
M. L. Laipio ◽  
M. A. Virtanen ◽  
E. Koivisto ◽  
...  
Keyword(s):  
Amino Acid ◽  
Glucose Metabolism ◽  
Carbohydrate Depletion

scholarly journals Post-drought hydraulic recovery is accompanied by non-structural carbohydrate depletion in the stem wood of Norway spruce saplings

2017 ◽  
Vol 7 (1) ◽  
Author(s):  
Martina Tomasella ◽  
Karl-Heinz Häberle ◽  
Andrea Nardini ◽  
Benjamin Hesse ◽  
Anna Machlet ◽  
...  
Keyword(s):  
Norway Spruce ◽  
Stem Wood ◽  
Structural Carbohydrate ◽  
Carbohydrate Depletion
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