Water stress and dormancy release in flower buds of<i>Coffea arabica</i>L. : Water movement into the buds

Astegiano, E.D.; Maestri, Moacyr; Estevao, M. de M.

doi:10.1080/14620316.1988.11515888

Cited by 5 publications

(6 citation statements)

References 6 publications

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“…Water uptake by buds was reduced when the subtending leaf was removed . Calcium, considered to be transported mainly in the apoplast, was not taken up by flower buds of non-stressed plants, but was readily imported into flower buds of stressed plants [5]. These data lead to the conclusion that water in dormant organs enters the bud via the symplast as suggested earlier [18] .…”

Section: Introductionsupporting

confidence: 66%

“…Inflorescences from branches that were cut the day after waterstressed plants were rewatered, reached anthesis 7 days later. Detached branches were also reported to flower in other studies, irrespective of stress imposed [5,18] . Before D3, total IAA per bud was relatively constant .…”

Section: Discussionmentioning

confidence: 73%

“…Growth of coffee flower buds that are dormant or have just been released from dormancy is impeded by the lack of water conducting elements [5,18] . The azosulfamide study confirms previous reports of low water uptake in buds at develop- mental stage 4 NS and D1 (Fig .…”

Section: Discussionmentioning

confidence: 99%

“…However, small amounts of tritiated water, fed to internode sections, were taken up by flower buds of non-stressed coffee plants [5]. The uptake doubled immediately after plants were water stressed and then reached a steady level 4 days after rewatering .…”

Section: Introductionmentioning

confidence: 99%

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Endogenous IAA levels and development of coffee flower buds from dormancy to anthesis

1994

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Dormant coffee (Coffea arabica L.) flower buds require water stress to stimulate regrowth . A xylem specific water-soluble dye, azosulfamide, was used to quantify water uptake of buds after their release from dormancy by water stress . In non-stressed flower buds, the rate of water uptake was generally slower and variable compared to stressed flower buds, where the rate of uptake tripled from 1 to 3 days after rewatering and preceded the doubling of fresh and dry weight of buds. Free, ester and amide IAA levels of developing flower buds were measured by gas chromatography-mass spectrometry-selective ion monitoring using an isotope dilution technique with [ 13 C6]IAA as an internal standard . Throughout development, the majority of IAA was present as amide IAA . The proportions of amide and free IAA increased one day after plants were released from water stress, and preceded the doubling of fresh and dry weight. Free and conjugated IAA content per bud remained stable during the period of rapid flower growth until one day before anthesis .Abbreviations : FW = fresh weight ; IAA = indole 3-acetic acid ; HPLC = high performance liquid chromatography ; GC-MS-SIM = gas chromatography-mass spectrometry selected ion monitoring ; NAA = naphthalene acetic acid ; IBA = indole butyric acid .

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Section: Introductionsupporting

confidence: 66%

Section: Discussionmentioning

confidence: 73%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Endogenous IAA levels and development of coffee flower buds from dormancy to anthesis

1994

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“…Magalhaes and Angelocci (1976) found that dormancy was broken and flowering induced when coffee plants were subjected to water stress with a threshold leaf WP of -1.2 MPa or less. Water movement into a flower bud occurs with increasing water stress and is enhanced by the presence of a leaf subtending the flower bud, compared to defoliated nodes (Astegiano et al, 1988).…”

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confidence: 99%

Flowering, Ethylene Production, and Ion Leakage of Coffee in Response to Water Stress and Gibberellic Acid

Schuch¹,

Fuchigami²,

Nagao³

1992

jashs

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The effects of water stress and GA, on breaking dormancy of flower buds of coffee (Coffea arabica L.) were investigated. In the first experiment, water was withheld until the trees reached leaf water potentials (WP) of -1.20, - 1.75, -2.65, or -3.50 MPa. Water potential, ethylene production, and ion leakage of flower buds and leaf disks were examined from release from water stress until anthesis. Trees that had experienced leaf WP of less than - 2.65 MPa, and flower bud WP of about - 4.0 MPa flowered within 9 days after irrigation. In flower buds where dormancy had been broken with water stress, ethylene production was low compared to dormant buds and flowers at anthesis. In the second experiment, O, 50, 100, or 200 mg GA3/liter was painted on branches of nonstressed trees. In experiment three, water was withheld until plants reached leaf WP of -0.6, -1.3, - 2.1, or - 3.0 MPa, then two branches per tree were painted with O, 50, and 100 mg GA3/liter. Gibberellic acid partially compensated for insufficient water stress to initiate flower opening. Ethylene evolution of flower buds was affected by water stress but not by GA3 treatment. Severe water stress treatments and GA, treatment (200 mg·liter-1) increased ethylene evolution of leaf disks. Ion leakage of flower buds and leaf disks was increased by severe water stress. Ion leakage of flower buds was highest at anthesis. After water stress, dormant and nondormant flower buds at the 4-mm stage could be distinguished based on their ethylene evolution. Chemical name used: gibberellic acid (GA3).

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Managing the coffee crop for flowering synchronisation and fruit maturation: Agronomic and physiological issues

Ronchi,

DaMatta

2024

Advances in Botanical Research

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Water stress and dormancy release in flower buds ofCoffea arabicaL. : Water movement into the buds

Cited by 5 publications

References 6 publications

Endogenous IAA levels and development of coffee flower buds from dormancy to anthesis

Endogenous IAA levels and development of coffee flower buds from dormancy to anthesis

Flowering, Ethylene Production, and Ion Leakage of Coffee in Response to Water Stress and Gibberellic Acid

Managing the coffee crop for flowering synchronisation and fruit maturation: Agronomic and physiological issues

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