CHAPTER 3 – Effects of Flooding on Growth and Metabolism of Herbaceous Plants | Semantic Scholar (2024)

In all three crops waterlogging at flowering led to damage, which could not be recovered during seed filling, which negatively affected seed more than the vegetative plant part weight.

In high salt conditions, S. maritima demonstrated many adaptations for tolerating extreme hypoxia, and it was also shown that the roots contained high lactate concentrations under aerated and hypoxic conditions.

A suite of adaptive responses documented here might help to explain the observed increase in abundance of this species during extensive floods, using plants established in species-diverse grassland microcosms.

The greater number and length of nodal roots of Muir did not lead to better shoot growth than in the other genotypes; one possible reason for this lack of improvement is a low eciency of aerenchymatous roots in wheat.

Low diffusional oxygen permeability of the OPR suggested that the barrier to radial oxygen loss was effective and may help to retain oxygen within the root and enhance diffusion of oxygen towards the apex in the presence of a relatively high water permeability.

The objective of this research was to identify distinguishable morphological changes in response to early season flooding (V2 growth stage) in an attempt to isolate a characteristic or groups of characteristics that can be used for identification of potentially flood tolerant varieties.

Challenging a heterogenous population of plants (rapidcycling Brassica rapa L.) with waterlogging, plants which differed in their response to rootzone hypoxia were selected and mass pollinated to produce the next generation.

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The role of enzymes in enzymology is explored in the context of photosynthetic CO2 Fixation and other enzymatic processes.

The results suggest that proline accumulation is an indicator of the cultivar's sensitivity to dehydration associated with the flooding stress, and confirm the notion thatproline may play a role in the post-stress recovery process.

Experiments with varied time of flooding, root excision, and stem girdling provide indirect evidence for an influence of roots in maintaining stomatal opening potential, and ethylene-induced petiole epinasty develops coincident with partialStomatal closure in waterlogged plants.

It is concluded that processes unique to germination and early stages of coleoptile elongation have greater oxygen requirements than cell extension, and elongation appears to be stimulated by accumulation of endogenous compounds which are dispersed in bubbled solutions and in air.

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