02573nas a2200193 4500008004100000245006300041210006000104260001800164300001400182490000700196520199600203653001502199653002302214653002902237653001902266653001902285100003902304856003602343 2020 eng d00aBotanical Pharmacognosy of Bacopa monnieri (Linn.) Pennell0 aBotanical Pharmacognosy of Bacopa monnieri Linn Pennell cNovember 2020 a1559-15720 v123 a

Backgound: B. monnieri (Linn.) Pennell is a slender, creeping and mat forming herb well adapted to grow in both terrestrial and submersed conditions. It is an important medicinal plant belongs to the family Plantaginaceae and espoused as a source for the Ayurvedic drug brahmi. Objectives: The present study aims to delineate the morphological and histomorpho diagnostic profile of the stem, root and leaves of brahmi and analyze their qualitative and quantitative anatomical peculiarities to support the pharmacobotanical characterizations using digital, stereo and polarized microscopic techniques. Results: Cross section of lamina had shown a homogeneous mesophyll fails to differentiate into palisade and spongy tissues. Lamina was amphistomatic which contained three different types of stomatal complexes vz., diacytic, anisocytic and anomoteracytic. The mean number of stoma per square millimeter of leaf area was found to be higher in adaxial surface (656.9/mm2) than abaxial (433.3/mm2) with a corresponding stomatal index of 15.2 and 9.4 respectively. Adventitious root in cross section gave ‘spokes in a wheel’ appearance and shoot cortex architecture had shown honey-comb pattern of aerenchyma chambers. Vascular bundles were many, conjoint and closed, where a centra solid core of xylem encircled by phloem. Crystal ideoblasts of calcium oxalate were observed in characteristic tissues of epidermis of the leaves, mesophyll, cortical tissues of stem, and intervening walls of the file of cells of diaphragms in stem and adventitious roots. Conclusion: The above delineated anatomical characteristics in conjunction with aerenchyma in root and shoot tissues as an effective water tolerance mechanism to thrive prolonged submergence in water logged conditions could provide valuable tags as useful markers for pharmacological identification of the taxon.

10aAerenchyma10aAnisocytic stomata10aCalcium oxalate crystals10aPlantaginaceae10aStomatal index1 aSudhakaran, Madathilparambil, Vasu uhttps://phcogj.com/article/1308