Understanding how perennial fruit trees adjust their
structural traits to water-limited environments is essential for sustainable
cultivation in semi-arid regions. Among such traits, stomatal characteristics
and wood anatomical features represent key components of plant adaptation,
influencing gas exchange, transpiration, and hydraulic conductivity. This
chapter explores the stomatal characteristics and wood anatomical adaptations
of Citrus reticulata and Citrus sinensis growing under the semi-arid conditions
of Mubi, northeastern Nigeria, and discusses how coordination between leaf and
stem structures contributes to ecological adjustment. Leaf epidermal analyses
were used to examine stomatal size, density, stomatal index, epidermal cell
density, and Potential Conductance Index (PCI), while stem samples were
assessed for vessel and fibre dimensions. The two species exhibited distinct
anatomical patterns. Citrus reticulata showed comparatively higher stomatal
dimensions and PCI, reflecting a greater potential for gas exchange, whereas
Citrus sinensis displayed larger vessel elements, suggesting enhanced hydraulic
capacity. These contrasting structural tendencies indicate different adaptive
strategies in balancing carbon assimilation and water transport under semi-arid
stress. By integrating stomatal and xylem traits, this chapter provides a
broader perspective on anatomical plasticity in Citrus species and highlights
the value of multi-organ trait analysis in understanding plant performance in
drought-prone agroecosystems.
Author(s) Details
Mohammad Saquib
Department of Botany, Faculty of Life Sciences, University of Maiduguri,
Borno State, Nigeria.
Please see the book here :- https://doi.org/10.9734/bpi/rpbs/v10/7211
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