Flag leaf senescence and grain growth in certain german varieties of spring wheat triticum aestivum

Stamp, P.; Herzog, H.

Zeitschrift fuer Pflanzenzuechtung 77(4): 330-338

1976


Accession: 005466362

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Abstract
The green area and chlorophyll content of the flag leaves of 6 German varieties of spring wheat were measured at intervals from the time of the formation of the ears, and the data obtained were related to grain growth. With regard to the length and breadth of the flag leaves, there were important differences between the varieties. Varieties with small flag leaves had a higher chlorophyll content. During the 5th wk after the formation of the ears a rapid reduction in the flag leaf green area occurred. Differences between the varieties were small, although significant as far as individual grain weight was concerned. During the first 3 wk after the formation of the ears all of the varieties showed similar patterns of individual grain growth; varieties having a high grain weight displayed a high, continuous growth rate during the following 2 wk. A positive correlation exists between the chlorophyll content of the flag leaf and individual grain weight, though the causes of this relation remain problematical.