The morphological, anatomical and physiological aspects of maize (zea mays l.) plant after applying the different levels of temperature treatments on pre-sowing maize seeds | [Journal of Natural & Applied Sciences Pakistan • 2020]

Author(s):

1. Zobia Anwer: Department of Botany, The Islamia University of Bahawalpur, Pakistan

2. Siddra Shabbir: Department of Botany, The Islamia University of Bahawalpur, Pakistan

3. Tanzeela Iram: Botanical Garden, The Government Sadiq College Women University Bahawalpur, Pakistan

4. Sumaira Tariq: Botanical Garden, The Government Sadiq College Women University Bahawalpur, Pakistan

Abstract:

Maize (Zea mays L.) belongs to poaceae family and used as a staple food throughout the world. Z. mays L. ranks third after wheat and rice. Four levels of temperature viz. 0°C (T1), 6°C (T2), 35°C (T3) and 60°C (T4) respectively for 24hrs were applied to elucidate the effects on pre-sowing Z. mays L. seeds. The experiment was performed in pots with triplicates under CRD and sown at 35°C soil temperature. Chlorophyll content was highest at 6°C and lowest at 0°C except carotene because carotene was lowest at 60°C. The two methods for chlorophyll content extraction were used and 80% acetone proved to be better than distilled water. The results of all anatomical parameters of 0°C and 6°C was worse than 6°C and 35°C like morphological characters because cell was initially damaged. Seeds which treated with both high and chilling temperatures were shown the thin stem, root, low amount of chlorophyll content, lowest value of morphological parameters and narrow leaf after emergence but vernalized seeds were shown the antagonistic characters as compared to heat shock plants. At high and low temperature, the growth of the plants stopped, their color became dull green and the inner cells were damaged. The results of vernalized (6°C) plants were significantly higher than 35°C in all morphological, physiological and anatomical aspects. The seeds did not affect at 35°C because seeds were vernalized before sowing. This study helps to understand the relationship between temperature and biochemical reactions in plants.

Page(s): 453-461

DOI: DOI not available

Published: Journal: Journal of Natural & Applied Sciences Pakistan, Volume: 2, Issue: 2, Year: 2020

Keywords:

chlorophyll content , Heat shock , Morphological analysis , Z , Anatomical Study , Vernalization , Mays L

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