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Table 1 HMT/HTMT activities in selected higher plants.

From: Involvement of S-adenosylmethionine-dependent halide/thiol methyltransferase (HTMT) in methyl halide emissions from agricultural plants: isolation and characterization of an HTMT-coding gene from Raphanus sativus(daikon radish)

Plant

Activity (U/g fresh tissue)*

Agricultural plants

 

   Family Brassicaceae

 

Brassica campestris (rapifera group; leaf)**

1,700

Brassica campestris L. (root)

1,400

Brassica campestris (pekinensis group; leaf)

1,900

Brassica napus L. (sprouting leaf) JP26148

2,600

Brassica oleracea (italica group)

1,300

Raphanus sativus (mature leaf)

3,000

Raphanus sativus (mature root)

0

Raphanus sativus (sprouting leaf) JP26972

3,600

Raphanus sativus (sprouting stem) JP26972

400

Raphanus sativus (sprouting root) JP26972

82

   Family Poaceae

 

Oryza sativa (sprouting leaf) JP222429

120

Triticum aestivum L. Thell (sprouting leaf) JP20300

210

Saccharum sp . L. JP172543

~1

Zea mays L. (sprouting leaf) JP846

~1

   Family Basellaceae

 

Basella rubra

24

Seaside plants

 

Artemisia fukudo Makino

~1

Arundo donax L. var. gracilis Hack(Poaceae)

~1

Suaeda maritima var. australia (R.Br.) Domin

~1

Fern

 

Cyathea lepifera

280

  1. Agricultural plants including O. sativa L. (paddy rice), Z. mays L. (maize), T. aestivum (L.) Thell (common wheat), B. napus L. (rapeseed), and R. sativus L. (daikon radish) were cultured hydroponically from seeds. In the case of Saccharum sp.(sugar cane), cut stems were cultured in soil. Other plants examined in the survey of HMT/HTMT activity were collected from the Himi Seaside Botanical Garden (Himi, Toyama, Japan) or supplied by local farmers. HMT/HTMT activity was assayed with the crude extracts prepared from each plant tissue. No activity was observed in the following plants (the extracts were obtained from leaf samples, unless otherwise indicated): agricultural plants: Allium sativum L. (root), Allium tuberosum, Arctium lappa(root), Calysctegia soldanella, Corchorus olitorius, Cucumis sativus(fruit), Daucus carota(root), Dioscorea opposita(root), Elatostema umbellatum var. majus, Glycine max L. Merr, Impomea batatas (root), Zingiber officinale(root), Lactuca sativa, Solanum tuberosum (root), seaside plants: Ascostichum aureum L., Bruguiera gymnorrhiza L. Savigny, Chrysanthemum crassum, Chrysanthemum pacificum Nakai, Chrysanthemum shiogiku , Glaux maritima var. obtusifolis Fern., Kandelia candel L. Druce, Rhizophora stylosa Griffith, Rubus trifidus Thunb, Triglochin maritimum, Vitex rotundifolia Linn. fil., Xylocarpus granatum (Lin.) Koenig.
  2. * The mean value of duplicate samples.
  3. **The plants whose HMT/HTMT activity was first analyzed in this work are written in bold letters.