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Effect of soil water
stress on yield and proline content of four wheat lines
M. Johari-Pireivatlou
1Baku State University, Baku, Azerbaijan.
*Corresponding author. E-mail:
h_maralian@yahoo.com.
Tel.: 00989141548667. Fax:00984527463417
Accepted
10 August, 2009 |
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This field study was conducted to evaluate the effect of
drought stress after anthesis on proline accumulation and
wheat yield during 2008 at Moghan region. Four lines of
bread wheat (N-82-9, N-83-5, N-84-12 and N-85-20) were
evaluated into contrasting water regimes (well-watered and
drought stressed after anthesis). The trial was carried out
in a 4 × 2 factorial experiment based on complete block
design with 3 replications. Proline content, total soluble
sugar (TSS), seed yield, straw yield, harvest index (HI),
1000 kernel weight, ear length, plant height and tiller
number were studied. The SAS software package was used to
analyze all the data and means were separated by the least
significant difference (LSD) test at P < 0.01. Results
showed that proline content and TSS increased by water
stress. Seed and straw yield decreased 25% approximately, if
water stress occurred after anthesis stage. The highest seed
yield observed in line N-82-9 and lowest observed in line
N-85-20 under water stress. Under control condition (None
stress), line N-82-9 had high seed yield, straw yield, HI
and 1000 kernel weight.
Key
words:
Water stress, Triticum aestivum, yield, proline,
TSS. |
