Plant growth stage

Hegde RS, JS Fletcher (1996) Influence of plant growth stage and season on the release of root phenolics by mulberry as related to development of phytoremediation technology. Chemosphere 32 2471-2479. 

Timing applications should be made at the time of the year and plant growth stage where potential worker exposure would be at a maximum. It is critical to have a mature crop because exposure will be increased owing to the larger surface area of the foliage compared with that of an immature crop. 

Several possibilities exist to explain the presence of heavy metals in medicinal plants and plant-based remedies thus strict morritoring tluough plant growth stages to the firrished product is vital. 

Picard, C., and Bosco, M. (2003). Soil antimony pollution and plant growth stage affect the biodiversity of auxin-producing bacteria isolated from the rhizosphere of Achillea ageratum L. FEMS Microbiol. Ecol. 46, 73-80. 

Bing LA, Lewis LC. Endophytic Beauveria bassiana (Balsamo) Vuillemin in corn the influence of the plant growth stage and Ostrinia nubilalis (Hiibner). Biocontrol Sci Technol 2 39-47, 1992. 

Compared with bulk soils, solid-phase speciation of Cd differs substantially in phosphate fertilizer-treated rhizosphere soils (Krishnamurti et al., 1996). The amounts of carbonate-bound Cd and metal-organic complex-bound Cd species of the rhizosphere soils at 2-week plant growth stage, particularly in the soils treated with Idaho phosphate fertilizer, are appreciably higher than those of the corresponding bulk soils (Fig. 4). In comparison to the corresponding bulk soils, the amount of carbonate-bound Cd species of the rhizosphere soils increased by 15-18% in the control soils and by 79-92% in the soils treated with Idaho phosphate fertilizer, whereas the metal-organic complex-bound Cd species increased by 4-7% in the control soils and by 2-3 times in the soils treated with Idaho phosphate fertilizer. The increase in the carbonate-bound Cd... 

Fig. 4. Distribution of particulate-bound Cd species in the bulk and rhizosphere (Rh) soils collected at 2-week plant growth stage (redrawn from Krishnamurti et al, 1996).

Nutrient contents are very variable and their release to available forms that the plant can use may not occur at the right plant growth stage. 

Water is, of course, essential for plant growth, but one of the themes of this chapter is that it may not be necessary for plant survival. Although most agronomically important plants are very sensitive to internal water deficits, the majority of plants at some stage of their life cycle are tolerant of desiccation. Few of these have vegetative parts which are desiccation tolerant, but the survival of even so-called drought-evading species, such as the ephemeral desert annuals, rests on the tolerance of their seeds to desiccation. 

R. Azcon and J. A. Ocampo, Effect of exudation on VA mycorrhizal infection at early stages of plant growth. Plant Soil 82 133 (1984). 

Pulse labeling—field Growth stage or plant age Barley (Hordeum vidgare) 49... 

Growth stage or plant age management practice Barley, wheat 54. 55... 

Proper understanding of allelopathic crop and weed plants including their growth stages at which toxin production occurs and characterization of allelopathic agents frcm these plants provide new avenues for developing technologies in weed control, crop efficiency, pest control and plant diseases. 

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