Primary Root Growth and the Pattern of Root Apical Meristem Organization are Coupled

Chapman, Kelly; Groot, Edwin P.; Nichol, Susan; Rost, Thomas L.

doi:10.1007/s00344-002-0036-x

Cited by 31 publications

(22 citation statements)

References 23 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…; Burton et al, 2013). Cortical cell files are formed by several successive asymmetric periclinal divisions in the root apical meristem (Baum et al, 2002;Chapman et al, 2003;Lux et al, 2004). It has been documented that the number of such periclinal divisions varies among species, genotypes, and root types (Lux et al, 2004;Coudert et al, 2010), which might generate differences in CCFN as observed here.…”

Section: Discussionmentioning

confidence: 52%

Reduced Root Cortical Cell File Number Improves Drought Tolerance in Maize

2014

View full text Add to dashboard Cite

ORCID ID: 0000-0002-7265-9790 (J.P.L.).We tested the hypothesis that reduced root cortical cell file number (CCFN) would improve drought tolerance in maize (Zea mays) by reducing the metabolic costs of soil exploration. Maize genotypes with contrasting CCFN were grown under wellwatered and water-stressed conditions in greenhouse mesocosms and in the field in the United States and Malawi. CCFN ranged from six to 19 among maize genotypes. In mesocosms, reduced CCFN was correlated with 57% reduction of root respiration per unit of root length. Under water stress in the mesocosms, genotypes with reduced CCFN had between 15% and 60% deeper rooting, 78% greater stomatal conductance, 36% greater leaf CO 2 assimilation, and between 52% to 139% greater shoot biomass than genotypes with many cell files. Under water stress in the field, genotypes with reduced CCFN had between 33% and 40% deeper rooting, 28% lighter stem water oxygen isotope enrichment (d 18 O) signature signifying deeper water capture, between 10% and 35% greater leaf relative water content, between 35% and 70% greater shoot biomass at flowering, and between 33% and 114% greater yield than genotypes with many cell files. These results support the hypothesis that reduced CCFN improves drought tolerance by reducing the metabolic costs of soil exploration, enabling deeper soil exploration, greater water acquisition, and improved growth and yield under water stress. The large genetic variation for CCFN in maize germplasm suggests that CCFN merits attention as a breeding target to improve the drought tolerance of maize and possibly other cereal crops.

show abstract

Section: Discussionmentioning

confidence: 52%

Reduced Root Cortical Cell File Number Improves Drought Tolerance in Maize

2014

View full text Add to dashboard Cite

show abstract

“…In the second case, of changes of meristem construction, the closed-to-open change in meristem type may be evidence of a large-scale wandering of the tensor analogue, even to the extent of its departure from the vectorial map of the root's interior; but it is more likely that the change is due to breakdown in the self-maintenance of the tensor analogue itself. The new, 'open'-type meristem then becomes destined to a final determinate phase of growth, ending with the abolition of a meristem and the cessation of root elongation (Chapman et al 2003).…”

Section: Self-maintenancementioning

confidence: 99%

Plant roots: autopoietic and cognitive constructions

Barlow

2010

Plant Root

View full text Add to dashboard Cite

Many facets reflecting the autopoietic process of Life and Living can be found in plant roots at many levels relevant to their organisation, from cells to ecosystems. At each level, there are sub-processes dedicated to both the autoreproduction and the self-maintenance of that level, these processes being contained within a boundary appropriate for that level. Autoreproduction and self-maintenance unite with a third sub-process, cognition, and provide the basis of a coherent multi-levelled programme of root-research.

show abstract

“…Plant material was dehydrated in an increasing series of tertiary alcohols (50, 70, 90, 100%, three changes in the latter), embedded in Paraplast X-tra (Sigma-Aldrich, USA) [27] and cut as 5-7-μm-thick transverse sections on a rotary microtome (Leica RM2135, Leica Instruments, Germany). Sections were stained with a 1% Alcian blue-safranin O mixture (2:1) [27], or according to a modified PAS method [28]. For the latter, series of dewaxed and hydrated sections were treated with 1% periodic acid for 20 min in a water bath (40°C), thoroughly rinsed with distilled water, and stained with Schiff 's reagent (fuchsin-sulfite reagent, Sigma-Aldrich, USA) for one hour in the dark.…”

Section: Anatomical Analysesmentioning

confidence: 99%

Vascular structure contributes to shoot sectoriality in Selaginella kraussiana

Gola

Jernstedt

2016

Acta Soc Bot Pol

View full text Add to dashboard Cite

Selaginella species are characterized by regular anisotomous dichotomous divisions of the shoot apical meristem, giving rise to two new axes (branches) which differ in size. A vital process is the formation of vascular connections, which enables continuous communication and consequent functional and developmental integration of a plant during branching. Here, we present the sequence of developmental changes in the vascular system of Selaginella kraussiana related to dichotomous branching. Stem vasculature in Selaginella kraussiana consists of two meristeles which change in arrangement during shoot development. Using dye tracers, we documented developmental functional isolation of meristeles associated with the specific structure of the stelar system, which results in a spatiotemporal sectoriality of the shoot. We discuss sectoriality in terms of possible significance for shoot development.

show abstract

Primary Root Growth and the Pattern of Root Apical Meristem Organization are Coupled

Cited by 31 publications

References 23 publications

Reduced Root Cortical Cell File Number Improves Drought Tolerance in Maize

Reduced Root Cortical Cell File Number Improves Drought Tolerance in Maize

Plant roots: autopoietic and cognitive constructions

Vascular structure contributes to shoot sectoriality in Selaginella kraussiana

Contact Info

Product

Resources

About