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A reliable protocol for flowering and fruiting in cuttings was developed.


Biology Articles » Botany » Phenology of Flowering and Starch Accumulation in Grape (Vitis vinifera L.) Cuttings and Vines » Tables

Tables
- Phenology of Flowering and Starch Accumulation in Grape (Vitis vinifera L.) Cuttings and Vines

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TABLE 1. Number of flowers, berries per bunch, seeds per berries, and fruit set in ‘Gewurztraminer’ (GW) and ‘Pinot Noir’ (PN) grapes



PN

GW


No. of flowers

    Vine 206 ± 24a 231 ± 32a
    Cutting 295 ± 28b 255 ± 40ab
No. of berries

    Vine 135 ± 20c 188 ± 18d
    Cutting 162 ± 3c 226 ± 38d
Fruit set (%)

    Vine 65 ± 3e 82 ± 6f
    Cutting 57 ± 6e 94 ± 6f
Number seeds per berry

    Vine 1·8 ± 0·8g 1·6 ± 0·7g
    Cutting 1·4 ± 0·5g 1·8 ± 1·0g

For each stage, ten flowers from five inflorescences were used, each inflorescence sampling from a different vine or cutting.

Values are means of ten inflorescences ± s.e.

Statistical analyses were carried out using Student's t-test. Means for a considered parameter were not significantly different when followed by the same letter (P ≥ 0·05).

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TABLE 2. Reproductive stages according to the classification of Eichhorn and Lorenz (1977)

  Developmental stage

  12 15 15 + 2 d 15 + 8 d 17 21






15 + 1 d

15 + 3 d






Male

    GW

        Vine SC mMC T m Vm MPG
        Cutting SC mMC T T Vm MPG
    PN

        Vine SC T m Vm YPG MPG
        Cutting SC T m m YPG MPG
Female

    GW

        Vine ST ST MMC MMC ESMC ES
        Cutting ST ST A A MMC ES
    PN

        Vine ST A MMC ESMC ES ES
        Cutting ST A MMC MMC ES ES

A, Archeospore; SC, sporogenous cells; m, microspores; mMC, microspore mother cell; MMC, macrospore mother cell; Vm, vacuolated microspores; MPG, mature pollen grain; ESMC, embryo sac mother cell; ES, embryo sac; ST, sporogenous tissue; T, tetrads; YES, young embryo sac; YPG, young pollen grain.

For vine and cutting, data are the means of ten flowers from five different inflorescences, and each inflorescence was sampled from a different vine or cutting. For each stage of development, the ten flowers considered show similar results.

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TABLE 3. Presence (+) or absence (0) of starch in Gewurztraminer (GW) and Pinot Noir (PN) vines and cuttings

  Gewurztraminer (vine/cutting)

Pinot Noir (vine/cutting)

  Developmental Stages

      15 + 2 15 + 8         15 + 2 15 + 8    


12

15

15 + 1

15 + 3

17

21

12

15

15 + 1

15 + 3

17

21


Male structures

Epidermis +/0 +/0 +/0 +/0 +/0   +/0 +/0 +/0 +/0 +/0  
Endothecium +/0 +/0 +/0 +/0 +/0   0/0 +/0 +/0 +/+ +/+  
Tapetum +/0 +/0 +/0 +/0 +/0   +/0 +/0 +/0 +/0 +/0  
Pollen 0/0 +/0 +/0 0/0 +/0   +/0 +/0 +/0 +/0 +/0  
Female structures

Ovary 0/0 0/0 +/0 +/0 +/+ +/+ +/0 +/0 +/0 +/+ +/+ +/+
Nucellus 0/0 0/0 0/0 0/0 0/0 0/0 0/0 0/0 0/0 +/0 0/0 0/0
Tegument 0/0 0/0 0/0 0/0 0/0 0/0 0/0 0/0 0/0 +/0 0/0 0/0
Embryo sac           0/0         0/0 0/0

For vine and cutting, ten flowers from five different inflorescences were analysed to study the presence of starch, and each inflorescence was sampled from a different vine or cutting. For each stage of development, the ten flowers considered show similar results for starch content. Structures are scored a ‘+’ if the ten inflorescences had starch, and a ‘0’ if the ten inflorescences had no starch.

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