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Table 1 Effect of GA3 and melatonin on vegetative growth of two artichoke cultivars 70 DAT during the two growing seasons of 2017/2018 and 2018/2019

From: Response of two seed-grown artichoke cultivars to GA3 and melatonin treatments

TreatmentsPlant height, cmLeaf No. /plantLeaf area, cm2Leaf fresh W, gLeaf dry W, gChlorophyll SPAD
First season (2017/2018)
  Imperial Star (IS)52.1 a12.3 a475 a106.5 a14.6 a46.3 a
  Romanesco (R)48.9 b11.3 b457 b93.8 b11.9 b44.3 b
 Foliar application
  Melatonin50.2 b12.2 a468 a101.3 b13.6 a45.8 b
  GA352.2 a13.2 a471 a102.8 a13.7 a47.0 a
  Control49.2 b10.2 b458 b96.8 c12.6 b43.3 c
  ISMelatonin52.0 a12.7 a478 a107.1 a15.1 a46.7 a
GA354.0 a13.7 a483 a109.9 a15.2 a48.0 a
Control50.3 a12.7 a464 b102.4 b13.6 b44.3 a
  RMelatonin48.3 a11.7 a458bc95.6 c12.1 c45.0 a
GA350.3 a12.7 a460bc95.7 c12.1 c46.0 a
Control48.0 a9.7 a453 c90.2 d11.1 d42.3 a
Second season (2018/2019)
  Imperial Star (IS)47.0 a11.1 a465 a102.0 a14.8 a45.0 a
  Romanesco (R)45.4 b9.9 b451 b93.8 b12.9 b43.8 b
 Foliar application
  Melatonin46.0ab10.5ab460 a101.3 a14.1 a43.8 b
  GA348.3 a11.2 a462 a102.8 a13.9 a47.3 a
  Control44.3 b9.8 b453 b96.8 b12.5 b42.0 b
  ISMelatonin46.7 b11.3 a466 b102.0 a15.4 a44.7 a
GA349.3 a12.0 a473 a101.7 a14.5ab48.0 a
Control45.0 c10.0 a457 c101.2 a14.3 b42.3 a
  RMelatonin45.3 c9.7 a453 cd96.3 b12.8 c43.0 a
GA347.3 b10.3 a451d97.3 b13.2 c46.7 a
Control43.7 d9.7 a448 d92.7 c12.7 c41.7 a
  1. Means within each column within main effects and interactions followed by the same letter are not significantly different at P < 5%