Hi, i'm looking for bibliographic references that explains the relationship between plant hormones and plant allometry (relation between the size of an organism and aspects of its physiology and morphology). In particular I want to explain the relationship between plant hormones and the length, weight and area of the different plant organs. Thank you so much!
Unfortunately, the effect that a particular hormone has on a plant's growth and development depends upon a number of things including the particular plant (even varying from one cultivar to the next), its stage of growth, the presence of biotic and abiotic stresses and the type of soil involved.
Auxins are hormones that stimulate growth in immature parts of plants.
plants, hormones help regulate physiological activities e.g.hormones in plants: auxins, cytokinins, gibberellins, ethylene and abscisic acid . Allometry gives relation between the size of an organism and aspects of its physiology, morphology, and life history.
Hi Santiago,
You should go to your library and borrow the "Plant Physiology and Development" by Taiz, Zeiger, Moller and Murphy at Oxford Press. When I was a student I read it like it was Lord of the Rings or Game of Thrones.
There are also reviews in Frontiers in Plant Science or Trends in Plant Science.
There are numerous plant hormones, but the five main are cited by Madhukar above. There are also Jasmonate, strigolactones, Salicylic acid, Brassinosteroids, and some peptidic and fatty alcohol hormones.
Cheers
Oliv
Unfortunately, the effect that a particular hormone has on a plant's growth and development depends upon a number of things including the particular plant (even varying from one cultivar to the next), its stage of growth, the presence of biotic and abiotic stresses and the type of soil involved.
The study of proportional relationships between size, shape, and function of part of or the whole organism is traditionally known as allometry. Examination of correlative changes in the size of interbranch distances (IBDs) at different root orders may help to identify root branching rules. Root morphological and functional characteristics in three range grasses {bluebunch wheatgrass [Pseudoroegneria spicata (Pursh) Löve], crested wheatgrass [Agropyron desertorum (Fisch. ex Link) Schult.×A. cristatum (L.) Gaert.], and cheatgrass (Bromus tectorum L.)} were examined in response to a soil nutrient gradient. Interbranch distances along the main root axis and the first-order laterals as well as other morphological and allocation root traits were determined. A model of nutrient diffusivity parameterized with root length and root diameter for the three grasses was used to estimate root functional properties (exploitation efficiency and exploitation potential). The results showed a significant negative allometric relationship between the main root axis and first-order lateral IBD (P ≤0.05), but only for bluebunch wheatgrass. The main root axis IBD was positively related to the number and length of roots, estimated exploitation efficiency of second-order roots, and specific root length, and was negatively related to estimated exploitation potential of first-order roots. Conversely, crested wheatgrass and cheatgrass, which rely mainly on root proliferation responses, exhibited fewer allometric relationships. Thus, the results suggested that species such as bluebunch wheatgrass, which display slow root growth and architectural root plasticity rather than opportunistic root proliferation and rapid growth, exhibit correlative allometry between the main axis IBD and morphological, allocation, and functional traits of roots. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3223053/
Occurrence of allometric IBD relationships may depend, however, on inherent species characteristics and habitat conditions. For example, the well-documented root proliferation that generally takes place in some species as a response to soil nutrient patches, which allows for either rapid acquisition of immobile soil resources or improved competitive ability, may impose restrictions on the development of allometric IBD relationships. For instance, proliferation of fine roots deployed into a particular enriched soil site does not appear to require a precise placement of lateral roots but rather rapid initiation and elongation of multiple roots. In contrast, under deprived soil nutrient conditions that favour the improvement of root foraging precision, the emergence of neighbouring roots at a distance that, for example, delays lateral root competition, would appear to be an appropriate strategy.
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3223053/
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