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Dec 1, 2023 · The formation of symbiotic nodules in legumes is a highly organized and sequential process. It begins with the activation of a NF signaling cascade in root epidermal cells, which triggers cell divisions in the root cortex to form a nodule primordium. Subsequently, a group of cells from the third layer of the root cortex are specified as the NM.
- Nitrogen Systemic Signaling: From Symbiotic Nodulation to ...
Symbiotic N 2 fixation in root nodules is a unique model to...
- Root Nodulation: A Paradigm for How Plant-Microbe Symbiosis ...
Autoactivation of the LHK1 cytokinin receptor (snf2 allele),...
- Nitrogen Systemic Signaling: From Symbiotic Nodulation to ...
Apr 1, 2021 · Symbiotic N 2 fixation in root nodules is a unique model to study this cost–benefit control of N acquisition by long-distance signals. Indeed, a new organ dedicated to N acquisition is formed, the nodule, that is nonessential when mineral N is available, in contrast to roots that have many other functions in addition to N nutrition.
- Pierre Gautrat, Carole Laffont, Florian Frugier, Sandrine Ruffel
- 2021
Biological nitrogen fixation in rhizobia occurs primarily in root or stem nodules and is induced by the bacteria present in legume plants. This symbiotic process has fascinated researchers for over a century, and the positive effects of legumes on soils and their food and feed value have been recognized for thousands of years.
Oct 20, 2011 · Autoactivation of the LHK1 cytokinin receptor (snf2 allele), which is located downstream of CCaMK (and is known to be involved in root development; see details below) also leads to spontaneous nodule formation, allowing the root nodule organogenic process to be more directly compared to the lateral root formation (Murray et al., 2007, Tirichine et al., 2007).
- Guilhem J. Desbrosses, Jens Stougaard
- 2011
The root ha irs curl and trap the rh izobia which enter the root hair through tubular structures called infection threads. Simultaneously Nod factors induce root cortex cells dedifferentiation and division, leading to the formation of nodule primordia which then differentiate into N 2-fixing nodules (Crespi & Frugier, 2008; Oldroyd et al. 2011).
Nov 22, 2019 · Fig. 3 ASL18a is involved in both lateral root and nodule development. (A) Lateral root densities and primary root length (n > 15 plants) of wild type, als18a, and nf-ya1-5 nf-yb1-1 (14-day-old). (B) Numbers (n = 15 plants) and diameters (n > 37 nodules) of nodules formed under conditions supplemented with KNO 3 (15 dai).
The first process involves the mitotic reactivation of differentiated root cortex cells to form nodule primordium after perceiving symbiotic signals. The second process enables the nascent nodule primordium cells to develop into various cell types, leading to the creation of a functional nodule capable of supporting nitrogen fixation. Thus ...
