A Nicholas

Publications (3)3.75 Total impact

• Article: Ultrastructural responses of the desiccation tolerant plants Xerophyta viscosa and X. retinervis to dehydration and rehydration

  A. Bhatt, Y. Naidoo, S. Gairola, A. Nicholas
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  ABSTRACT: This paper compares the changes in water content, chlorophyll a fluorescence and leaf ultrastructure during dehydration and rehydration in two desiccation tolerant plants Xerophyta viscosa and X. retinervis. Both species showed decreasing quantum efficiency of photosystem 2 (Fv/Fm) with decreasing water content. Extreme water loss observed after 25 d of dehydration resulted in considerable damage of leaf tissue ultrastructure. After rehydration, both species need several days to reconstitute their photosynthetic machinery.
  Biologia Plantarum 04/2012; 53(2):373-377. · 1.97 Impact Factor
• Article: The foliar trichomes of Plectranthus laxiflorus Benth [Lamiaceae]: an important medicinal plant

  Arvind Bhatt, Y Naidoo, A Nicholas
  New Zealand Journal of Botany 06/2010; 48(2):55-61. · 0.75 Impact Factor
• Article: The foliar trichomes of Hypoestes aristata (Vahl) Sol. ex Roem. & Schult var aristata (Acanthaceae) a widespread medicinal plant species in tropical sub-Saharan Africa: with comments on its possible phylogenetic significance.

  A Bhatt, Y Naidoo, A Nicholas
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  ABSTRACT: The micromorphology of foliar trichomes of Hypoestes aristata var. aristata was studied using stereo, light and scanning microscopy (SEM). This genus belongs to the advanced angiosperm family Acanthaceae, for which few micromorphological leaf studies exist. Results revealed both glandular and non-glandular trichomes, the latter being more abundant on leaf veins, particularly on the abaxial surface of very young leaves. With leaf maturity, the density of non-glandular trichomes decreased. Glandular trichomes were rare and of two types: long-stalked capitate and globose-like peltate trichomes. Capitate trichomes were observed only on the abaxial leaf surface, while peltate trichomes were distributed on both adaxial and abaxial leaf surfaces.
  Biological research 01/2010; 43(4):403-9. · 1.03 Impact Factor