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| Web URL(s): | http://onlinelibrary.wiley.com/doi/10.1111/j.1744-7348.1977.tb01909.x/abstract
Last checked: 09/25/2015
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Notes: Abstract only
http://onlinelibrary.wiley.com/doi/10.1111/j.1744-7348.1977.tb01909.x/epdf
Last checked: 09/25/2015
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| Publication Type:
| Refereed |
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| Author(s): | Laidlaw, A. S.;
Berrie, A. M. M. |
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| Author Affiliation: | Laidlaw: Depratment of Agriculture, Field Botany Research Division, Newforge Lane, Belfast; Berrie: Department of Botany, The University, Glasgow |
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| Title: | The relative hardening of roots and shoots and the influence of day-length during hardening in perennial ryegrass |
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| Source: | Annals of Applied Biology. Vol. 87, No. 3, December 1977, p. 443-450. |
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| # of Pages: | 8 |
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| Keywords: | TIC Keywords: Hardening; Lolium perenne; Photoperiod; Cold resistance; Winterkill; Electrolytic methods
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| Geographic Terms: | UK |
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| Abstract/Contents: | The influence of long and short days during the hardening period on the cold hardiness of seedlings of perennial ryegrass cv. (a) Pax OEtofte and (b) S23 was studied as was the relative hardiness of roots and shoots. Hardiness was assessed by the electrolyte release method which was a measure of the amount of damage subsequent to low temp. treatment. Long days promoted hardiness in shoots of (a) and in one case under short days the roots were found to be hardy. Generally roots were less hardy than shoots in (a) and plants of (b) hardened under long days for 2 wk. When hardened at the 4th leaf stage for 2 wk at +5 deg C under long day conditions plants of (a) were more hardy than those of (b). The long day effect on hardiness was arrived at more rapidly, there being no difference in hardiness after 3 wk in (a) hardened under long or short days, whereas a significant degree of hardening was observed after 1 wk of hardening under long days at -4 deg . The results obtained are discussed in relation to winter kill of grasses in W. Scotland, and it is considered that root damage is not an important factor in causing winter kill. The promotive effect of long days on hardiness when hardening commences in late autumn is considered an advantage in temperate regions as it may also allow early frosts to be withstood. |
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| Language: | English |
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| References: | 17 |
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| Note: | Tables
Graphs |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Laidlaw, A. S., and A. M. M. Berrie. 1977. The relative hardening of roots and shoots and the influence of day-length during hardening in perennial ryegrass. Ann. Appl. Biol. 87(3):p. 443-450. |
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| Web URL(s):
http://onlinelibrary.wiley.com/doi/10.1111/j.1744-7348.1977.tb01909.x/abstract
Last checked: 09/25/2015
Access conditions: Item is within a limited-access website
Notes: Abstract only
http://onlinelibrary.wiley.com/doi/10.1111/j.1744-7348.1977.tb01909.x/epdf
Last checked: 09/25/2015
Requires: PDF Reader
Access conditions: Item is within a limited-access website |
| 
MSU catalog number: QH 301 .A48 |
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