Effects of transplanting shock on maize root growth
1997
Chen Zong-Long | Zhang He-Ming
A field experiment was conducted in 1993 involving three maize genotypes - a drought- sensitive hybrid, a drought tolerant hybrid and an open-pollinated variety (OPV). Results show that the response of the maize plant to transplanting shock depended on its genetic background. Compared with direct-seeding, root initiation in the two transplanted hybrids was stimulated by the shock. For the hybrid tolerant to drought, the root initiation stimulus started earlier than for the drought-sensitive hybrid, but t in the OPV root initiation seemed to be generally depressed . Prior to the 5-leaf stage the root dry weights of the three genotypes following transplanting were all lower than expected. The stimulus for increased rooting took place from the 6-leaf stage through to the silking stage. In the hybrid sensitive to drought this stimulus came much later than for the other two genotypes.
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