Thumbnail Image

Theses

Browse

20211
Reset filters
Subject: Agricultre × Author: NARAH, BIDISHA × Type: Thesis ×
Reset filters

Search Results

Now showing 1 - 1 of 1
  • Thumbnail Image
    ThesisItemOpen Access
    Morpho-physiological and biochemical characterization of tea [Camellia sinensis (L) O. Kuntze] germplasm maintained in the field gene bank of AAU
    (AAU, Jorhat, 2021) NARAH, BIDISHA; Bhuyan, R P
    Tea is one of the oldest non- alcoholic bevaragesin the world which require proper observation, evaluation and documentation of germplasm to develop planting material of diverse genetic background. Germplasm collection helps in discovering archetypes which help in sorting out the taxonomy of tea. Accordingly this study was made to evaluate the morpho-physiological variability and to analyse the biochemical variability of unidentified tea germplasm in field gene bank maintained in the Experimental Garden for Plantation Crops. For which thirty germplasms were selected under the study. The germplasms THT 027, THT 028, THT 040, THT 041, THT 042, THT 043, THT 044 and THT 045 were found to have multiple stems which were similar to standard China type. Moreover they possessed purple colored young shoots, leaf upper surface was found to be “rugose”, ovate type leaf and erect leaf pose which were similar with typical China type, whereas the germplasms THT 021, THT 022, THT 024, THT 026, THT 030, THT 032, THT 033, THT 034, THT 035, THT 038 , THT 039, THT 048, THT 049 and THT 050 were found to have green color young shoot, glossy leaves, lanceolate type to oblong type of leaf shape and semi-erect to horizontal leaf pose similar with typical Assam type and Cambod type. In all the germplasm stem pigmentation was found to be indiscriminate. The germplasms THT 029, THT 033, THT 040, THT 041, THT042, THT 043, THT 044 and THT 045 exhibited densely distributed pubescence which is an important character for cup quality. The germplasms THT 021, THT 022, THT 023, THT 046 and THT 047 exhibited sparsely distributed young shoot pubescence while the remaining were observed to have medium young shoot pubescence. Soil Plant Analysis Detector (SPAD) study revealed that the germplasms THT 027 (49.4), THT 040 (47.2), THT 044 (44.7) showed the high SPAD value and the lower value was found for germplasms THT 041(25.7) and THT 042(25.9). The Relative Water Content(RWC) was recorded high in the germplasms THT 029(88.5%), THT 030(88.8%), THT 031(87.6%) whereas lower RWC was found in the germplasms THT 021(77.5%), THT 049(77.6%) and THT 050(77.8%). The highest polyphenol content was found in the germplasm THT 049 and lowest was found for THT 039. Germplasm THT 021 had the highest caffeine content of 4.1 % and lowest in THT 040 of 2.0 %. Moreover in case of total flavanoid all the germplasms exhibiting China type characters possessed high flavanoid.