Sectoriality in xylem connections between the bunch and leaves of the grapevine (Vitis vinifera) shoot

Clarke, Simon J.; Rogiers, Suzy Y.; Currie, Geoffrey

doi:10.1016/j.scienta.2014.01.041

Cited by 2 publications

(1 citation statement)

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“…At this time, we cannot say whether liquid smoke treatment causes similar losses in xylem sectoriality. Evidence in the literature suggests xylem vasculature in certain higher plants can exhibit distinct connectivity giving rise to sectorial patterns in water and nutrient partitioning to aboveground tissues [ 47 ]. Future studies using radiotracers will examine this feature.…”

Section: Discussionmentioning

confidence: 99%

Treatments with Liquid Smoke and Certain Chemical Constituents Prevalent in Smoke Reduce Phloem Vascular Sectoriality in the Sunflower with Improvement to Growth

Noel

Benoit

Wilder

et al. 2022

IJMS

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Many higher plants possess a physiological organization that is based upon the carbon economy of their parts. While photosynthates are partitioned according to the relative strength of the plant’s sink tissues, in many species there is also a very close relationship between partitioning, phyllotaxy and vascular connectivity giving rise to sectorial patterns of allocation. Here, we examined the influence of smoke and certain chemical constituents prevalent in smoke including, catechol, resorcinol and hydroquinone on phloem vascular sectoriality in common sunflower (Helianthis annuus L.), as a model plant for sectoriality. By administering radioactive carbon-11 to a single source leaf as 11CO2, 11C-photosynthate allocation patterns were examined using autoradiography. A 1:200 aqueous dilution of liquid smoke treated soil caused 2.6-fold and 2.5-fold reductions in phloem sectoriality in sink leaves and roots, respectively. Treatment with catechol (1,2-d ihydroxybenzene) or resorcinol (1,3-dihydroxybenzene), polyphenolic constituents that are prevalent in smoke, caused similar reductions in phloem sectoriality in the same targeted sink tissues. However, treatment with hydroquinone (1,4-dihydroxybenzene) had no effect. Finally, the longer-term effects of smoke exposure on plant growth and performance were examined using outdoor potted plants grown over the 2022 season. Plants exposed to liquid smoke treatments of the soil on a weekly basis had larger thicker leaves possessing 35% greater lignin content than untreated control plants. They also had thicker stems although the lignin content was the same as controls. Additionally, plants exposed to treatment produced twice the number of flowers with no difference in their disk floret diameters as untreated controls. Altogether, loss of phloem sectoriality from exposure to liquid smoke in the sunflower model benefited plant performance.

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Section: Discussionmentioning

confidence: 99%