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Root growth pattern in finger millet under well-watered and drought stress condition: Its relation to shoot mass production

Root growth pattern in finger millet under well-watered and drought stress condition: Its... Improvement in rainfed finger millet productivity is close to stagnation from the last decade due to insufficient above-ground biomass which includes vegetative shoot mass, grain-bearing ear-heads and their size. As the partitioning of biomass to sink traits has reached reasonably high, an increase in shoot mass is expected to improve the yields further. The shoot mass is primarily dependent on the root system, hence, the root growth pattern at different crop growth stages and their relationship to shoot mass was studied under well-watered (WW) and drought stress (DS) conditions. Results revealed that, the mean root length increased by twofold from 15 to 30 DAS followed by a marginal increase up to 75 DAS under WW condition. While the root dry weight had a slow increase up to 45 DAS and rapid growth afterwards under WW condition. The DS during tillering (15 to 30 DAS) and later vegetative stage (35 to 55 DAS) increased the root length marginally, whereas, the root dry weight and shoot dry weight were decreased substantially and; recovered to > 80 and nearly 70% respectively after the alleviation of DS. The root dry weight was positively and significantly related with shoot mass at all stages up to 55 DAS in WW and up to 45 DAS in DS, whereas the root length at 45 DAS only under WW and DS conditions. Therefore, rapid deep root and particularly the root mass at tillering have relevance in shoot mass production, especially under DS conditions. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Plant Physiology Reports Springer Journals

Root growth pattern in finger millet under well-watered and drought stress condition: Its relation to shoot mass production

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References (53)

Publisher
Springer Journals
Copyright
Copyright © Indian Society for Plant Physiology 2021
ISSN
2662-253X
eISSN
2662-2548
DOI
10.1007/s40502-021-00592-2
Publisher site
See Article on Publisher Site

Abstract

Improvement in rainfed finger millet productivity is close to stagnation from the last decade due to insufficient above-ground biomass which includes vegetative shoot mass, grain-bearing ear-heads and their size. As the partitioning of biomass to sink traits has reached reasonably high, an increase in shoot mass is expected to improve the yields further. The shoot mass is primarily dependent on the root system, hence, the root growth pattern at different crop growth stages and their relationship to shoot mass was studied under well-watered (WW) and drought stress (DS) conditions. Results revealed that, the mean root length increased by twofold from 15 to 30 DAS followed by a marginal increase up to 75 DAS under WW condition. While the root dry weight had a slow increase up to 45 DAS and rapid growth afterwards under WW condition. The DS during tillering (15 to 30 DAS) and later vegetative stage (35 to 55 DAS) increased the root length marginally, whereas, the root dry weight and shoot dry weight were decreased substantially and; recovered to > 80 and nearly 70% respectively after the alleviation of DS. The root dry weight was positively and significantly related with shoot mass at all stages up to 55 DAS in WW and up to 45 DAS in DS, whereas the root length at 45 DAS only under WW and DS conditions. Therefore, rapid deep root and particularly the root mass at tillering have relevance in shoot mass production, especially under DS conditions.

Journal

Plant Physiology ReportsSpringer Journals

Published: Sep 1, 2021

Keywords: Finger millet; Root length; Root mass; And shoot mass

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