+ Site Statistics
References:
54,258,434
Abstracts:
29,560,870
PMIDs:
28,072,757
+ Search Articles
+ Subscribe to Site Feeds
Most Shared
PDF Full Text
+ PDF Full Text
Request PDF Full Text
+ Follow Us
Follow on Facebook
Follow on Twitter
Follow on LinkedIn
+ Translate
+ Recently Requested

Effect of sugars on rate of elongation of root hairs of Agrostis alba L



Effect of sugars on rate of elongation of root hairs of Agrostis alba L



Physiol Plantarum 15(4): 675-682



The objective of the study was to determine whether growth of root hairs is normally substrate-limited, and if so, to determine the optimal concentration for maximum rate of elongation. The rate was determined for a 1-hour control period, the sugar-containing solution was then added and rates determined at 30 minute intervals for 2 hours. Although glucose and sucrose increased the average growth rate of hairs, a disproportionate number was initially inhibited. Many of these hairs later recovered and even grew at an accelerated rate. When data from these hairs were excluded, elongation rate of hairs subjected to 3% glucose increased to 155% of the pretreatment rate within 30 minutes and to 179% of the control in the 90-120 minute period. Similar results were obtained with sucrose. There was initially a slight stimulation by 2% galactose, but this was followed by increasing inhibition (to 10% of the pretreatment rate). These results demonstrate that rate of elongation of root hairs is substrate-limited and that glucose and sucrose are satisfactory substrates, whereas galactose actually inhibits growth. The elongating root hair is a sensitive, rapidly responding system suitable for studying the immediate effects of external factors upon growth.

(PDF emailed within 0-6 h: $19.90)

Accession: 014026557

Download citation: RISBibTeXText

DOI: 10.1111/j.1399-3054.1962.tb08116.x


Related references

Effect of indoleacetic acid on rate of elongation of root hairs of Agrostis alba L. Physiol Plantarium 13(1): 36-45, 1960

Effect of p-chlorophenoxyisobutyric acid on rate of elongation of root hairs of Agrostis alba L. Physiol Plantarum 14(1): 40-48, 1961

Effect of 3-amino-1,2,4-triazole and L-histidine on rate of elongation of root hairs of Agrostis alba. Weeds, 9: 3, 437-42. bibl.11, 1961

Effect of 3-amino-l,2,4-triazole and L-histidine on rate of elongation of root hairs of Agrostis alba. Weeds 9(3): 437-442, 1961

The action and interaction of indoleacetic acid and p-chlorophenoxyisobutyric acid on the rate of elongation of root hairs of Agrostis alba L. PLANT PHYSIOL 35(Suppl vii ), 1960

Mannitol-induced stimulation of elongation of root hairs of Agrostis alba L. Physiol Plant 18(1): 24-30, 1965

Effect of gibberellic acid on the elongation rate of Agrostis a1ba root hairs. Physiologia Pl, 22: 4, 759-63. Bibl. 14, 1969

Measuring maximum root growth instead of longest root elongation in metal tolerance tests for grasses agrostis capillaris agrostis delicatula and agrostis castellana. Plant & Soil 144(2): 305-308, 1992

Studies on the growth of root hairs in solutions V Root-hairs elongation as an index of root development. 1928

Effect of gibberellin on diurnal periodicity and activities of mitoses in the apical root meristem of Poa pratensis and Agrostis alba. Zapiski Sverdlovskogo otdeleniia Vsesoiuznogo botanicheskogo obshchestva(7): 115-117, 1977

Time lapse analysis of root elongation rate in crops. 1. Variations in root elongation rate per hour and its comparison between day and night. Report of the Tokai Branch of the Crop Science Society of Japan ( 119): 11-12, 1995

Observations on a new species of Olpidium occurring in the root hairs of Agrostis. Trans British Mycol Soc 17(3): 182-194, 1932

Note on the occurrence of a new species of Olpidium in the root hairs of Agrostis. J. Bd. Greenk. Res, 3: 32-3, 1933