New Zealand Journal of Crop and Horticultural Science abstracts
Controlled deterioration for vigour assessment and predicting seedling
growth of winter squash (Cucurbita maxima) seed lots under salt stress
Kazim Mavi
Ibrahim Demir
Department of Horticulture
Faculty of Agriculture
University of Ankara
Ankara, Turkey
email: demir@agri.ankara.edu.tr
Abstract The controlled deterioration (CD) test (45°C
and 24% moisture content) was used to assess the seed vigour of three winter
squash (Cucurbita maxima) seed lots. Germination after CD was correlated
with seedling growth parameters under salt stress conditions (50, 100, and
150 mM NaCl) in an unheated glasshouse emergence test. Germinations after
CD for 24, 48, and 72 h were all 94% or greater, and these treatments were
not successful in ranking the lots. However, germination of squash seeds
after CD for 96 h ranged from 25% to 75% for the three lots. Seedling emergence
was >90% at both 50 and 100 mM NaCI and did not differ among lots. However,
at 150 mM NaCI, emergence did differ among the lots, and the CD 96-h germinations
were positively and significantly related to mean seedling emergence time,
seedling fresh and dry weight, hypocotyl length, and cotyledon width. The
CD test can be used to predict seedling performance of winter squash seed
lots under salt stress. However, the method should be further verified by
using a larger number of seed lots.
Keywords Cucurbita maxima; winter squash; controlled
deterioration; seedling performance; salt stress
H04068; Online publication date 13 May 2005 Received 3 August 2004; accepted
5 April 2005
New Zealand Journal of Crop and Horticultural Science, 2005, Vol. 33:
193-197
0014-0671/05/3302-0193 © The Royal Society of New Zealand 2005
PDF file of entire paper: Print-quality (60K) |
screen-quality (72K)
This year's abstracts |
Journal home page |
All abstracts |
Publishing home page
