Early water-deficit effects on seminal roots morphology in barley

Sahnoune, Mohamed; Adda, Ahmed; Soualem, Samira; Harch, Meriem Kaid; Merah, Othmane

doi:10.1016/j.crvi.2004.01.004

Cited by 18 publications

(12 citation statements)

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“…Water deficit affects not only the growth and development of aerial plant parts but also the roots. The seminal roots are shorter and the root volume is lower in cereals, such as barley (Sahnoune et al, 2004), wheat (Guedira et al, 1997), and oat (Larsson & Górny, 1988) when grown under water deficit. In barley, root growth was restricted mostly in deeper (> 30 cm) soil layers (Sahnoune et al, 2004).…”

Section: Early Season Drought and Irrigationmentioning

confidence: 99%

“…The seminal roots are shorter and the root volume is lower in cereals, such as barley (Sahnoune et al, 2004), wheat (Guedira et al, 1997), and oat (Larsson & Górny, 1988) when grown under water deficit. In barley, root growth was restricted mostly in deeper (> 30 cm) soil layers (Sahnoune et al, 2004). A common problem in the Boreal region, connected to early season drought, is inhibition of early tillering, which can result in formation of late tillers after rainfall at anthesis (Mäkelä & Muurinen, 2011).…”

Section: Early Season Drought and Irrigationmentioning

confidence: 99%

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Water Quality, Soil and Managing Irrigation of Crops

Lee¹

2012

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This book, Water Quality, Soil and Managing Irrigation of Crops, consists of twelve chapters written by experts in various disciplines covering topics regarding quality of water for re-use in agriculture, plant agronomy, soils and its properties, health issues pertaining to soil pollution, infiltration, as well as irrigation systems. Chemical and biochemical properties of water in water bodies are indeed important for water ecosystems management. Guidelines for quality of water for re-use in irrigated agriculture are important not only for the short-term measure of replenishing much needed water resources for plants, but suffice to say, that the long term use of such waters, if not carefully handled, can lead to permanent destruction of good agricultural land and may further aggravate water conditions of water bodies and wetlands downstream, where an environmental disaster is waiting to accumulate and recovery may be too difficult thereafter. Thus, for those involved with irrigation and drainage engineering practices, the totality of provision of prudent water resources and soil management is the order of the day if no detrimental after-effects are to surface. Development of appropriate irrigation management strategies in order to produce crops of high quality without wastage of water is the way forward in our future world wherein global warming is a foregone conclusion. Consequent to it may be floods and droughts that seemingly do not follow historical patterns and thus are difficult to cope with. With more than 70% of the water resources going to agriculture and where more than 40% of global food is produced on irrigated soils, it would be a disastrous scenario where too much water unexpectedly washes away much needed crops whilst the onset of unexpected droughts will play havoc with no way out. Another aspect that has been the focus of many researches is the introduction of salt-tolerant varieties of crops. This is particularly so in areas where the accumulation of salts in precious soils is beginning to take its toll on crops. This incremental accumulation of salt concentration through use and re-use of saline waters is building up salinity levels to the extent of eventually rendering the land irrevocable. This is also evident in many areas where seawater saline intrusion occurs and the fresh saline interface keeps encroaching higher up the water table. But such use and re-use of saline waters is the only way that crops can be irrigated, and thus a vicious cycle repeats. Although the growing of crops out of thin air and with irrigation (aeroponics) is possible and hydroponics technology has been established, these technologies are reserved for growing expensive crops as well as in small scale production in view of the high energy costs involved. Therefore, to grow stable food

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Section: Early Season Drought and Irrigationmentioning

confidence: 99%

Section: Early Season Drought and Irrigationmentioning

confidence: 99%

Water Quality, Soil and Managing Irrigation of Crops

Lee¹

2012

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“…Further knowledge is needed to understand how desert species cope with extreme drought and predict the fate of natural vegetation under climate change. At the morphological level, both shoots and roots are key components of plant adaptation to drought (Sahnoune et al ., ). Knowledge on the architecture, growth rate, horizontal and vertical distribution of roots is crucial in understanding their ecological tolerance, adaptive strategy and spatial distribution (Bell & Sultan, ).…”

Section: Introductionmentioning

confidence: 97%

Growth establishment and phenology of four woody Saharan species

Derbel

Chaïeb

2012

Afr. J. Ecol.

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Henophyton deserti, Calligonum polygonoides, Ephedra alata and Anthyllis henoniana may be suitable Saharan species for the rehabilitation of degraded lands. In this context, the phenology, excavation of root systems and seedling establishment of these species were investigated in the southern Tunisia. Our data suggest that phenological differences between the studied species may depend on the rooting depth. The mean seedling emergence rate was 73% in H. deserti, 66% in A. henoniana, 60% in C. polygonoides and 50% in E. alata. Statistical analyses of seedling establishment showed a highly significant difference among the four species in both seasons (F = 1595.15, P < 0.0001), species (F = 781.57, P < 0.0001) and species/season interaction (F = 61.84, P < 0.0001). After 3 years, seedling mortality ranged from 73% to 89%. Seedling mortality reached a maximum in the summer of the first year of study (P < 0.001). This study provided further understanding of the ecological tolerance, adaptive strategy and the low density of these species in nature. Henophyton deserti appears to be better adapted to the harsh desert environment. These findings explain the very high density observed in the Sahara compared with other studied species. This species has therefore proven to be an excellent candidate for the ecological restoration of degraded desert rangelands and can be introduced successfully in to rehabilitation programmes. RésuméHenophyton deserti, Calligonum polygonoides, Ephedra alata et Anthyllis henoniana pourraient être des espèces sahariennes de adéquates pour la réhabilitation de terres dégradées.Dans ce contexte, la phénologie, l'excavation du système racinaire et l'installation des plantules de ces espèces ont été étudiées dans le sud de la Tunisie. Nos données suggèrent que certaines différences phénologiques entre les espèces étudiées pourraient dépendre de la profondeur de leur enracinement. Le taux moyen d'émergence de plantules était de 73% pour H. deserti, 66% pour A. henoniana, 60% pour C. polygonoides et 50% pour E. alata. Des analyses statistiques de l'établissement des plantules a montré une différence très significative pour les quatre espèces entre les saisons (F = 159,15, P < 0,0001), les espèces (F = 781,57, P < 0,0001) et pour l'interaction espèce/saison (F = 61,84, P < 0,0001). Après trois ans, la mortalité des plantules allait de 73 a' 89%. Elle a atteint un maximum durant l'été de la première année de cette étude (P < 0,001). Cette étude a permis de mieux comprendre la tolérance écologique, une stratégie adaptative, et la faible densité de ces espèces dans la nature. Henophyton deserti semble être mieux adapté au rude environnement du désert. Ces résultats expliquent sa tres haute densité observée dans le Sahara comparée aux autres espèces étudiées. Cette espèce s'est donc révélée être une excellente candidate pour la restauration écologique de territoires désertiques dégradés et elle pourrait être introduite avec succès dans des programmes de réhabilitation.

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“…Among these organs, roots play an essential role in water deficit tolerance [ 10 , 11 , 12 ]. Indeed, the morphological and structural remodeling of roots under drought, are greatly involved in plant dehydration avoidance [ 13 , 14 , 15 ].…”

Section: Introductionmentioning

confidence: 99%

Morpho-Anatomical Modulation of Seminal Roots in Response to Water Deficit in Durum Wheat (Triticum turgidum var. durum)

Felouah,

Ammad,

Adda

et al. 2024

Plants

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The productivity of durum wheat in Mediterranean regions is greatly reduced by water deficits that vary in intensity and time of occurrence. The development of more tolerant cultivars is the main solution for fighting these stresses, but this requires prior study of their mechanisms. The involvement of the root system in drought avoidance is of major importance. It is in this context that the present work attempts to establish the impact of morpho-anatomical remodeling of seminal roots on dehydration avoidance at the javelina stage in five durum wheat genotypes grown under three water regimes, 100%, 60% and 30% of field capacity (FC). In the last two treatments, which were applied by stopping irrigation, moisture was concentrated mainly in the depths of the substrate cylinders and was accompanied by greater root elongation compared with the control. The elongation reached rates of 20 and 22% in the ACSAD 1231 genotype and 12 and 13% in the Waha genotype, in the 60% FC and 30% FC treatments respectively. The seminal roots anatomy was also modified by water deficit in all genotypes but to different degrees. The diameter of vessels in the late metaxylem vessels was reduced, reaching 17.3 and 48.2% in the Waha genotype in the 60% FC and 30% FC treatments, respectively. The water deficit also increased the number of vessels in the early metaxylem, while reducing the diameter of its conducting vessels. ACSAD 1361 and Langlois genotypes stood out with the highest rates of diameter reduction. The morpho-anatomical transformations of the roots contributed effectively to the plants’ absorption of water and, consequently, to the maintenance of a fairly high relative water content, approaching 80%.

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Early water-deficit effects on seminal roots morphology in barley

Cited by 18 publications

References 32 publications

Water Quality, Soil and Managing Irrigation of Crops

Water Quality, Soil and Managing Irrigation of Crops

Growth establishment and phenology of four woody Saharan species

Morpho-Anatomical Modulation of Seminal Roots in Response to Water Deficit in Durum Wheat (Triticum turgidum var. durum)

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