Changes in root xylem anatomy of peanut genotypes with different drought resistance levels under early‐season drought

2021 ◽  
Author(s):  
Nuengsap Thangthong ◽  
Sanun Jogloy ◽  
Nuntawoot Jongrungklang ◽  
Craig K. Kvien ◽  
Ian C. Dodd ◽  
...  
Keyword(s):  
Drought Resistance ◽  
Xylem Anatomy ◽  
Early Season

scholarly journals Changes in Root Anatomy of Peanut (Arachis hypogaea L.) under Different Durations of Early Season Drought

Agronomy ◽  
2019 ◽  
Vol 9 (5) ◽  
pp. 215 ◽  
Author(s):  
Nuengsap Thangthong ◽  
Sanun Jogloy ◽  
Tasanai Punjansing ◽  
Craig K. Kvien ◽  
Thawan Kesmala ◽  
...  
Keyword(s):  
Drought Resistance ◽  
Lateral Roots ◽  
Soil Surface ◽  
Vessel Diameter ◽  
Second Order ◽  
Root Anatomy ◽  
Drought Treatment ◽  
Drought Period ◽  
Early Season ◽  
Selection Of

Changes in the anatomical structure of peanut roots due to early season drought will likely affect the water acquiring capacity of the root system. Yet, as important as these changes are likely to be in conferring drought resistance, they have not been thoroughly investigated. The objective of this study was to investigate the effects of different durations of drought on the root anatomy of peanut in response to early season drought. Plants of peanut genotype ICGV 98305 were grown in rhizoboxes with an internal dimension of 50 cm in width, 10 cm in thickness and 120 cm in height. Fourteen days after emergence, water was withheld for periods of 0, 7, 14 or 21 days. After these drought periods, the first and second order roots from 0–20 cm below soil surface were sampled for anatomical observation. The mean xylem vessel diameter of first- order lateral roots was higher than that of second- order lateral roots. Under early season drought stress root anatomy changes were more pronounced in the longer drought period treatments. Twenty-one days after imposing water stress, the drought treatment and irrigated treatment were clearly different in diameter, number and area of xylem vessels of first- and second-order lateral roots. Plants under drought conditions had a smaller diameter and area of xylem vessels than did the plants under irrigated control. The ability of plants to change root anatomy likely improves water uptake and transport and this may be an important mechanism for drought tolerance. The information will be useful for the selection of drought durations for evaluation of root anatomy related to drought resistance and the selection of key traits for drought resistance.

Physiological attributes associated with early-season drought resistance in spring durum wheat cultivars

1998 ◽  
Vol 78 (2) ◽  
pp. 227-237 ◽  
Author(s):  
R. El Hafid ◽  
Dan H. Smith ◽  
M. Karrou ◽  
K. Samir
Keyword(s):  
Water Stress ◽  
Drought Stress ◽  
Durum Wheat ◽  
Drought Resistance ◽  
Triticum Durum ◽  
Dry Matter ◽  
Wheat Cultivars ◽  
Early Season ◽  
Physiological Attributes ◽  
Triticum Durum Desf

One of the common features of the Mediterranean climate in North Africa is the uncertainty of rainfall immediately after wheat (Triticum durum Desf) emerges. Relatively little work has been done to compare the drought resistance of spring durum wheat cultivars under early-season drought stress. There is a limited insight into the physiological basis of spring durum wheat drought resistance in rainfed Mediterranean regions. Field experiments were conducted in 1995 and 1996 growing seasons, and a greenhouse experiment was conducted in 1996 to examine differences in some physiological characters among six spring durum wheat cultivars in response to different durations of early-season drought, and rewatering; and to determine the relationships of these characters to drought resistance. Six spring durum wheat cultivars were evaluated under four water regimes. Water regime treatments were: a well-irrigated treatment; and three water deficit treatments imposed during the period from emergence through either the onset of tillering, mid-tillering or the end of tillering. Cultivars differed widely in their response to early season water stress. Under drought stress conditions, grain yield, aboveground dry matter yield, water use efficiency for the grain (WUEg) and for the total dry matter (WUEdm) were strongly positively associated with net CO2 uptake:transpiration ratio (A/E), and osmoregulation capacity. It is concluded that drought-induced changes in A, A/E, stomatal resistance, and osmotic adjustment are possible key control points in determining the drought-resistance of a cultivar. Furthermore, there is a substantial degree of intraspecific variation for the above mentioned physiological attributes to explore as a selection tool. Selection for high osmoregulation capacity and high A/E ratio would seem to be a justifiable means of improving total dry matter and grain yield under conditions of early-season water stress. Key words: Wheat, Triticum durum Desf., physiological attributes, early-season drought

Root distribution patterns of peanut genotypes with different drought resistance levels under early-season drought stress

2017 ◽  
Vol 204 (2) ◽  
pp. 111-122 ◽  
Author(s):  
N. Thangthong ◽  
S. Jogloy ◽  
N. Jongrungklang ◽  
C. K. Kvien ◽  
V. Pensuk ◽  
...  
Keyword(s):  
Drought Stress ◽  
Drought Resistance ◽  
Root Distribution ◽  
Distribution Patterns ◽  
Early Season

Drought Resistance Mechanism and Adaptation to Water Stress in Sorghum [Sorghum bicolor (L.) Moench]

2018 ◽  
Vol 9 (1) ◽  
pp. 167-172
Author(s):  
Rajani Verma ◽  
◽  
Ramesh Kumar ◽  
Dr. Anamika Nath ◽  
◽  
...  
Keyword(s):  
Water Stress ◽  
Sorghum Bicolor ◽  
Drought Resistance ◽  
Resistance Mechanism ◽  
Sorghum Bicolor L

The influences of water stress on the quality of rice in a cold region and comparison of identification methods of quality drought resistance

2013 ◽  
Author(s):  
Xiaohong Guo ◽  
Guiping Zheng ◽  
Jian Zhou ◽  
Dandan Li ◽  
Yue Zheng ◽  
...  
Keyword(s):  
Water Stress ◽  
Drought Resistance ◽  
Cold Region ◽  
Identification Methods

Early season weed control in onions

1982 ◽  
Vol 35 ◽  
pp. 304-307
Author(s):  
J.J.C. Scheffer ◽  
G.J. Wilson
Keyword(s):  
Weed Control ◽  
Early Season

Early season use of vamidothion against woolly apple aphid

1984 ◽  
Vol 37 ◽  
pp. 241-244
Author(s):  
J.G. Charles ◽  
V. White
Keyword(s):  
Early Season ◽  
Woolly Apple Aphid

Molecular breeding of fragrant early-season hybrid rice using the BADH2 gene

2019 ◽  
Vol 51 (6) ◽  
Author(s):  
Zhonghua Sheng ◽  
Sajid Fiaz ◽  
Qianlong Li ◽  
Wei Chen ◽  
Xiangjin Wei ◽  
...  
Keyword(s):  
Molecular Breeding ◽  
Hybrid Rice ◽  
Early Season ◽  
Badh2 Gene

Trichoderma harzianum improves drought resistance in maize by mediating acetic acid-ethanol metabolic pathways

2019 ◽  
Vol 52 (3) ◽  
Author(s):  
Zhongyou Ma ◽  
Linggao Ge ◽  
Cheng Zhou ◽  
Xiaoming Lu
Keyword(s):  
Acetic Acid ◽  
Drought Resistance ◽  
Trichoderma Harzianum ◽  
Metabolic Pathways

Evaluation and prediction of maize response to early-season injury from stalk borer

1990 ◽  
Author(s):  
Paula Marie Davis
Keyword(s):  
Early Season ◽  
Stalk Borer ◽  
Maize Response
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