Hordeum species

HVlOl Barria, B. N., S. V. Cpaj, and H. M. HV113 Niemeyer. Occurrence of Diboa in wild Hordeum species and its relation to Aphid resistance. Phytochemistry 1992 31(1) 89-91. 

HSM, Hordeum species (barley), mutation + NT 611 Kaul Tandon(1981) ... 

Hordeum, Aegilops and Agropyron to wheat (see Chapter 12), and possibly to other cereal species. 

Abbreviations of plant species As, Avena satlva Gm, Glycine max Hv, Hordeum vulgare Ta, Trltlcum aestlvum. 

Some assays were done using sinigrin (Sarsyntex brand) and with the chloroform-soluble fraction obtained from campestris, at the same concentration (0.013 g per Petri dish), using as indicator species Hordeum vulgare, Lolium multiflorum, Rapheinus sativus, and oleracea var. italics. 

CHS carries out a series of sequential decarboxylation and condensation reactions, using 4-courmaroyl-CoA (in most species) and three molecules of malonyl-CoA, to produce a poly-ketide intermediate that then undergoes cyclization and aromatization reactions that form the A-ring and the resultant chalcone structure. The chalcone formed from 4-courmaroyl-CoA is naringenin chalcone. However, enzyme preparations and recombinant CHS proteins from some species have been shown to accept other HCA-CoA esters as substrates, such as cinnamoyl-CoA (see, e.g., Ref. 37). In particular, the Hordeum vulgare (barley) CHS2 cDNA encodes a CHS protein that converts feruloyl-CoA and caffeoyl-CoA at the highest rate, and cinnamoyl-CoA and 4-courmaroyl-CoA at lower rates. 

DPA did not cause stomatal closure In any of the species tested, while the effect of PA ranged from a response as rapid as that caused by ABA in Commelina, to a less rapid closure than after ABA treatment in Amaranthus, Hordeum, Xanthium, and Zea, to no response at all in Vicia (76). 

The general procedure for seedling bioassay was as follows 25 seeds of each species were placed per dish, excepting Hordeum vulgare (10 seeds per dish), with 5 mL of the test solution, and incubated in the dark at 25°C. Four replicates for each concentration were set up. Germination and growth time varied for each plant species Lepidium sativum, 3 days Lactuca sativa and Hordeum vulgare, 5 days and Allium cepa, 7 days. 

Aryloxyphenoxypropanoates and cyclohexanediones are herbicidal to most monocotyledons but not to dicotyledons. A comparison between a susceptible species, barley (Hordeum vulgare), and a tolerant species, soybean (Glycine max) showed that haloxyfop was effective in reducing lipid biosynthesis in barley but not in soybean leaf discs (Table I). 

SENSITIVE PLANTS Species of the getter a Pioea, Pinux, Larix, Tilia, Fagus, Malus, Hordeum, Avena, Secale, Triticum 0.09 0.08 0.40 0.35... 

S. oleracea utilized L-ascorbic acid and dehydro-L-ascorbic acid (but not diketo-L-gulonate) for oxalic acid biosynthesis (Table VI) (29). In these experiments, l-[1- C] ascorbic acid was converted to labeled oxalic acid. The fate of the C4 fragment from L-ascorbic acid or dehydro-L-ascorbic acid was not determined. Similar results (Table VI) were obtained with O. stricta and O. oregana. Conversion to labeled oxalate proceeded in the dark as well as in the light when detached leaves were given L-[1- C]ascorbic acid. Hordeum vulgare (barley), a nonaccumulator of oxalate, converted only 2% of the in l-[1- C] ascorbic acid to oxalic acid under conditions identical to those used in studies with Oxalis species. 

Fluorobenzoates have been used as tracers for the movement of water in soil and groundwater so that their potential toxicity to plants is important. A study using 11 crop species and pentafluorobenzoate and 2,6-difluoro- and 3,4-difluorobenzoate showed the generally low toxicity of these compounds (Bowman et al. 1997). More extensive studies were carried out with alfalfa (Medico sativa), barley (Hordeum vulgare), and canola (Brassica napus) ... 

Comments The ISO guideline focuses only on barley (Hordeum vulgare L.) as a test species. 

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