Pollen Morphology and Viability of Wild Noni (Morinda tomentosa Heyne Ex Roth) | Chapter 2 | Innovations in Biological Science Vol. 1

 The objective of this study was to ascertain pollen morphology, pollen viability with an acetocarmine test and germination test of pollen in assorted concentrations of sucrose and boric acid solution. The physiology of pollen, mainly germination and viability have considerable attention for its application in plant breeding, conservation, adaptation and understanding of physiological behavior of fertilizing pollen grains. The present investigation was undertaken at the experimental farm of the Central Horticultural Experiment Station (CIAH), Vejalpur, Panchmahals, Gujarat, where 31 diverse accessions of wild Noni (Morinda tomentosa Heyne ex Roth) collected from forest areas of Panchmahals, Kheda and Dantiwada during 2007-08. The mean size of pollen grains varied in different media with comparatively larger size in distilled water. The pollen viability varied between 83.47 to 95.53 percent among the accessions. Fifteen to twenty percent solo sucrose medium appeared precise for pollen germination. The boric acid addition irrespective of concentration (0.005 and 0.01 percent) in sucrose medium of different concentrations impacted the pollen germination. The germination was highest (85.26 percent) when 0.005 per cent boric acid was added to 10 per cent sucrose solution. Further, the lower concentration of boric acid (0.005 percent) displayed better germination of pollen grains than a higher concentration of boric acid. The average pollen tube length was maximum (62.42 µ) in 15 percent sucrose solution while it was minimum (14.36 µ) in 30 percent sucrose solution indicating an intermediate concentration of sucrose medium as appropriate for the growth of the pollen tube. The addition of boric acid to the sucrose medium evinced a clear impact on the growth of pollen tube with a maximum average pollen tube length of 120.74µ recorded in 15 percent sucrose medium fortified with 0.005 percent boric acid.  Further research could explore the underlying mechanisms behind the observed effects of sucrose and boric acid on pollen behavior, enhancing our understanding of plant reproductive biology and facilitating improved agricultural practices.

Author(s) Details:

A. H. Rathod,
Department of Genetics and Plant Breeding, Sardarkrushinagar Dantiwada Agricultural University, Sardarkrushinagar-385506 (Gujarat), India.

S. Acharya,
CERW, SD Agricultural University, Vijapur, Gujarat, India.

A. K. Singh,
Central Horticultural Experiment Station (CIAH), Vejalpur, Panchmahals, Gujarat, India.


Please see the link here: https://stm.bookpi.org/IBS-V1/article/view/14011

Genetic Variability and Heritability in Diverse Accessions of Wild Noni (Morinda tomentosa Heyne ex Roth) in North Gujarat, India | Chapter 1 | Innovations in Biological Science Vol. 1

 The present study aims to provide valuable insights for the development of effective breeding strategies and the conservation of this important medicinal plant species. Genetic variability and heritability for morphological and phytochemical attributes were studied in Morinda tomentosa. The experimental material for the present investigation comprised 31 diverse accessions of wild Noni (Morinda tomentosa Heyne ex Roth) collected from forest areas of Panchmahals, Kheda, and Dantiwada during year, 2007-08. The magnitude of genotypic coefficient of variation was higher for all but number of seeds per fruit, flavonol content in leaf, number of branches per plant, flavonol content in fruit, fruit length, total soluble sugar, plant height, ascorbic acid content in fruit and fruit width indicating lesser role of environment in the expression of the traits. The broad sense heritability was higher for all but fruit width indicating explicit realization of heritable variance and thereby offering abundant chances of improvement in those characters by simple selection. Genetic advance is the ultimate objective of interest for a breeder. The genetic advance increases with increase in genetic variance. The heritability in broad sense as such also has little significance as it includes both additive and epistatic gene effects. The increased estimates of genetic advance with high heritability for fruit, leaf, and carotenoid content suggested that additive gene action had a role in the expression of these traits, further supporting the idea that phenotypic selection based on these features would be more successful.

Author(s) Details:

A. H. Rathod,
Department of Genetics and Plant Breeding, SD Agricultural University, Sardarkrushinagar, India.

S. Acharya,
Centre of Excellence for Research on Wheat, SDAU, Vijapur, India.

A. K. Singh,
Central Horticultural Experiment Station, Vejalpur, India.

Please see the link here: https://stm.bookpi.org/IBS-V1/article/view/14010