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Biblioteca(s): | INIA La Estanzuela.
Fecha corriente: | 01/09/2021
Fecha de la última actualización: | 02/09/2022
Autoria: | ROBIN A.H.K.; IRVING , L.J.; CRUSH, J.; SCHNYDER, H.; LATTANZI, F.; MATTHEW, C.
Afiliación: | ARIF HASAN KHAN ROBIN, Department of Genetics and Plant Breeding, Bangladesh Agricultural University.; LOUIS JOHN IRVING, Graduate School of Life and Environmental Sciences, University of Tsukuba, Tsukuba.; JIM CRUSH, AgResearch, Ruakura Research Centre, PB 3123, Hamilton 3240, New Zealand.; HANS SCHNYDER, Lehrstuhl für Grünlandlehre, Technische Universität München, 85354 Freising, Germany.; FERNANDO A. LATTANZI, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; CORY MATTHEW, School of Agriculture and Environment PN433, Massey University, Private Bag11-222, Palmerston North 4442, New Zealand.
Título: | Time course of root axis elongation and lateral root formation in perennial ryegrass (Lolium perenne l.).
Año de publicación: | 2021
Fuente/Imprenta: | Plants, 8 August 2021, Volume 10, Issue, Article number 1677. Open Access. Doi: https://doi.org/10.3390/plants10081677
DOI: | 10.3390/plants10081677
Idioma: | Inglés

Notas:

Article history:Received: 22 July 2021; Accepted: 12 August 2021; Published: 15 August 2021. 
Supplementary Material - https://www.mdpi.com/2223-7747/10/8/1677/s1

Contenido:

Abstract: Grasses have a segmental morphology. Compared to leaf development, data on rootdevelopment at the phytomer level are scarce. Leaf appearance interval was recorded over time to allow inference about the age of segmental sites that later form roots. Hydroponically grown Lolium perenne cv. Aberdart tillers were studied in both spring and autumn in increasing and decreasing day length conditions, respectively, and dissected to define the development status of roots of known age on successive phytomers basipetally on the tiller axis. Over a 90-day observation period spring and autumn tillers produced 10.4 and 18.1 root bearing phytomers (Pr), respectively. Four stages
of root development were identified: (0) main axis elongation (~0?10 days), (1) primary branching (~10?18 days), (2) secondary branching (~18?25 days), and (3) tertiary and quaternary branching without further increase in root dry weight. The individual spring roots achieved significantly greater dry weight (35%) than autumn roots, and a mechanism for seasonal shift in substrate supply to roots
is proposed. Our data define a root turnover pattern likely also occurring in field swards and provide insight for modelling the turnover of grass root systems for developing nutrient efficient or stress tolerant ryegrass swards.

Palabras-Clave: | Lateral roots; Lolium perenne; Phytomer; Root; Root branching; Root development dry weight; Root elongation; Root surface area; Root volume.
Categoría del tema: | --

URL:

http://www.ainfo.inia.uy/digital/bitstream/item/16681/1/plants-10-01677.pdf
https://www.mdpi.com/2223-7747/10/8/1677/pdf

Registro original: | INIA La Estanzuela (LE)
Ejemplares: | LE - (103441-1) - PXI - AP - DD - PP/ Plants, 8 August/2021 -  -  - DIS