Cotton Seedling and First‐Bloom Plant Characteristics: Relationships with Drought‐Influenced Boll Abscission and Lint Yield

Cook, C. G.; El-Zik, K. M.

doi:10.2135/cropsci1992.0011183x003200060031x

Cited by 24 publications

(20 citation statements)

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“…The genotypes differed significantly in total leaf area at each of these samplings. Similarly, Cook and El-Zik (1992) compared seedlings from six cotton genotypes under normal and drought stressed field conditions and found that root dry weight, shoot dry weight and root-to-shoot ratio, varied among genotypes when sampled 28 DAP. While genotypes differed significantly in both total leaf area and total leaf biomass, specific leaf area (on a total leaf area basis) was 17 DAP Genotype 25 *** *** *** *** *** *** *** nS the same for all genotypes (data not shown).…”

Section: Genotypic Variation In Early Vigor Traitsmentioning

confidence: 99%

Early Vigor of Advanced Breeding Lines and Modern Cotton Cultivars

et al. 2015

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Stand establishment and early vigor are critical to the successful production of cotton (Gossypium hirsutum L.). Rapid early growth could provide significant advantages to young plants relative to diseases, insects, and weeds. The objectives of this research were to identify traits that contribute to differences in early growth, characterize genotypic variation in early vigor among modern cultivars and advanced breeding lines, and determine the effect of the seed production environment on early vigor. Early growth of 10 genotypes from private companies and 18 unreleased breeding lines was compared through measurements of leaf area and biomass under field conditions in 2 yr. A positive correlation of seed weight and rapid early growth was observed up to 32 d after planting (DAP). Cotyledon area was positively associated with shoot dry weight over the course of the first 52 DAP. Significant genotypic differences were observed for cotyledon and total leaf areas, and for cotyledon, first true leaf, total leaf, stem, and total shoot dry weights in both years within approximately the first 4 wk after planting. No correlation between lint yield and rapid early growth was found. For the first 17 (2009) and 32 (2008) DAP—but not after that—plants grown from seeds produced in distinct environments differed in early vigor. Overall, seeds from breeding lines produced more vigorous seedlings than did seeds of commercial genotypes. Although heritability of the examined traits has not been established, the broad range in values and significant genotypic variation suggest that breeding for enhanced early vigor should be possible without compromising yield.

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Section: Genotypic Variation In Early Vigor Traitsmentioning

confidence: 99%

Early Vigor of Advanced Breeding Lines and Modern Cotton Cultivars

et al. 2015

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“…Exotic genotypes of cotton were reported to have larger roots and a larger root:shoot ratio than commercial cultivars (McMichael and Quisenberry, 1991). Under drought stress, lint yields of six cotton genotypes were reported to be negatively correlated to rootrshoot ratio (Cook and El-Zik, 1992). These four reports suggest that high yielding cultivars may have smaller root volumes and a decreased potential for N uptake from the soil.…”

Section: Introductionmentioning

confidence: 96%

Effects of foliar urea‐ and triazone‐nitrogen, with and without boron, on cotton

Heitholt

1994

Journal of Plant Nutrition

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Optimal lint yield in recently released high-yielding upland cotton (Gossypium hirsutum L.) cultivars requires careful nutrient management. It is not known whether these cultivars are capable of responding to foliar nitrogen (N) and boron (B) fertilizer when conventional soil fertility practices are used. The objectives of this study were (i) to determine the responses of a high-yielding cotton cultivar to foliar N and B fertilizer and (ii) to compare two N sources when applied to foliage of cotton. A two-year field study was conducted with a factorial arrangement of three N treatments and two B treatments. Plants received foliar applications of the surfactant Tween 20 in H 2 O (check), or one of the following treatments plus surfactant: B (as H 3 BO 3 ), triazone-N (24% of N as S-tetrahydrotriazone), triazone-N plus B, urea-N, or urea-N plus B. Leaf blade mineral element composition, lint yield, and fiber properties were determined. Averaged across years, lint yields were significantly higher in the check, both urea treatments, and the triazone plus B treatment than in the B only treatment. Foliar applications of either triazone-N or urea-N increased leaf blade N concentration but did not affect leaf blade B concentration. Foliar applications of B increased leaf 1. Mention of a trade mark, vendor, or proprietary product does not constitute a guarantee or a warranty of this product by the United States Department of Agriculture and does not imply its approval to the exclusion of other products or vendors that may also be suitable. 57 58 HEUHOLT blade B concentration but did not affect leaf blade N concentration. There were no N x B interactions on leaf blade N, leaf blade B, or on most fiber properties. For almost all variables, the effect of triazone-N was similar to that of urea-N. The results of this study suggested that augmenting standard cotton N and B fertility with foliar sprays was likely to increase leaf blade N and B concentrations but was unlikely to significantly effect yield or fiber properties.

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“…These results imply that drought tolerant ramie cultivars better adapt to drought stress by maintaining their leaves and improving cuticular integrity rather than reducing the total amount of leaf exposure to the environment. Critical factors for drought tolerance are the abilities of roots to extract water from soils with limited water availability and to store this water for later use (Cook and El-Zik 1992). Previous studies have shown that higher root-to-shoot ratios help crops tolerate soil drought and maintain higher yields in moisture deficit environments (Li 1993;He et al 1995;Adam et al 2002).…”

Section: Discussionmentioning

confidence: 99%

Morphological, Anatomical, and Physiological Assessment of Ramie [Boehmeria Nivea (L.) Gaud.] Tolerance to Soil Drought

Liu

Liang

et al. 2005

Genet Resour Crop Evol

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Fiber yield is reduced when ramie [Boehmeria nivea (L.) Gaud.] is produced under drought stress. Responses in Leaf morphology, root development and stem anatomy, and physiology of six cultivars, varying in tolerance to drought stress, were measured to identify plant characteristics for adaptation to drought stress. Ramie plants, established from 10-cm sections of shoots, were grown in pots with soil. When plants were 60 cm tall (about 40 days), moisture content in the medium was maintained at 55% of water-holding capacity for 28 days by weighing the pots and sparingly watering. Medium was maintained at 80-85% of water-holding capacity for the control. Drought-tolerant cultivars of ramie had more fine hairs on abaxial leaf surfaces, produced thicker leaf cuticles, better preserved leaf shape, and erectness, lost fewer leaves. They also generated longer roots with larger root masses and more storage organs, preserved higher root-to-shoot ratios, produced larger diameter stem vessels, and better conserved cell integrity than drought-sensitive cultivars of ramie when plants were grown under drought stress. Fiber yield was better in drought tolerant cultivars of ramie, because these cultivars had adapted root systems, leaf responses, cellular responses, and biochemical activities to allow plants to continue higher levels of photosynthesis and carbon deposition under more stressful environments than the less drought tolerant cultivars. Cultivars 'Huangketong' and 'Qingkezi' were best adapted to drought tolerance in the study.

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Cotton Seedling and First‐Bloom Plant Characteristics: Relationships with Drought‐Influenced Boll Abscission and Lint Yield

Cited by 24 publications

References 0 publications

Early Vigor of Advanced Breeding Lines and Modern Cotton Cultivars

Early Vigor of Advanced Breeding Lines and Modern Cotton Cultivars

Effects of foliar urea‐ and triazone‐nitrogen, with and without boron, on cotton

Morphological, Anatomical, and Physiological Assessment of Ramie [Boehmeria Nivea (L.) Gaud.] Tolerance to Soil Drought

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