Germination and seedling growth of cotton: salinity‐calcium interactions
The effects of NaCl salinity on germination and early seed plant growth of cotton were studied. Germination was each delayed and reduced by two hundred weight unit m−3 NaCl within the presence of an entire nutrient medium. Seedlings, 7–9 d old, were greatly reduced in contemporary weight by salinity. The addition of supplemental Ca2+ (10 weight unit m−3 as SO42− or Cl−) to the medium failed to improve germination however, to an outsized degree, offset the reduction in root growth caused by NaCl. Roots growing within the high salt medium while not supplemental Ca2+ appeared infected by microbes. The ion specificity of the useful Ca2+ impact on growth was determined by testing additions of MgSO4 or KCl to the NaCl treatments. The contents of K4 and Ca2+ were reduced in each roots and shoots by the NaCl treatments. Supplemental Ca2+ partly offset this impact for K4 within the roots and for Ca2+ in each roots and shoots. metallic element contents weren’t plagued by the supplemental Ca2+. it’s finished that the useful impact of high Ca2+ concentrations on root growth of cotton seedlings during a saline setting is also thanks to maintenance of K/Na‐selectivity and adequate Ca standing within the root. [1]
Effect of Salinity on Germination and Seedling Growth of twoAtriplexspecies (Chenopodiaceae)
Salinity is one in all the environmental factors that includes a important influence on the germination of tracheophyte seeds and plant institution. Salinity affects imbibition, germination and root elongation. However, the manner within which NaCl exerts its influence on these very important processes, whether or not it’s through AN diffusion impact or a selected particle toxicity, remains not resolved. pleomorphism seeds of the halophytesAtriplex prostrataandA. patulawere treated with varied iso-osmotic solutions of NaCl and polythene glycol (PEG). for every treatment, imbibition, germination rate, p.c germination, germination recovery and nuclear space of root tip cells were compared. Higher concentrations of NaCl (-1.0 MPa) were a lot of restrictive to imbibition, germination and seed plant root elongation than iso-osmotic PEG solutions. All seeds recovered from a pre-treatment with -2.0 MPa NaCl and PEG solutions, except massive seeds ofA. prostratawhich didn’t germinate following transfer from -2.0 MPa NaCl. NaCl caused a bigger increase in nuclear volume than iso-osmotic PEG solutions. These information counsel that the influence of NaCl could be a combination of AN diffusion impact and a selected particle effect. [2]
Toward a Causal Explanation of Plant Invasiveness: Seedling Growth and Life‐History Strategies of 29 Pine (Pinus) Species
We studied twenty nine pine (Pinus) species to check the hypothesis that invasive species in disturbed habitats have distinct attributes. spermatophyte relative rate (RGR) and measures of invasiveness were completely associated across species similarly as at intervals phylogenetically freelance contrasts. High RGR, little seed lots, and short generation times characterize pine species that ar successful invaders in disturbed habitats. Discriminant analysis and supply regression unconcealed that RGR was the foremost vital issue among these life‐history traits separating invasive and noninvasive species. we tend to conjointly explored the causes of variations in RGR among invasive and noninvasive species. whereas web assimilation rate, leaf mass magnitude relation, and specific leaf space (SLA) were all found to be contributive completely to RGR, SLA was found to be the most element liable for variations in RGR between invasive and noninvasive pines. we tend to investigated variations in SLA any by finding out leaf anatomy, leaf density, and leaf thickness. we tend to conjointly evaluated relative leaf production rate as a very important facet of SLA. we tend to projected a theoretical causative network of all relevant variables. [3]
Rice seed priming with sodium selenate: Effects on germination, seedling growth, and biochemical attributes
The aim of this study was to work out the results of metal selenate (15, 30, 45, 60, 75, 90, and one05 mg kg−1) on the germination and seed plant growth of Changnongjing 1 rice (Oryza sativa L.) at 25 °C and 30 °C. Low selenate concentrations evoked shorter and additional uniform germination periods than did ultrapure water at each temperatures. Seedlings fit with low selenate concentrations were superior to those primed with ultrapure water in terms of plant height, recent weight, dry matter accumulation, and soluble sugar and supermolecule contents. Lower selenate concentrations (15–75 mg kg−1) evoked higher pigment and phenol contents in seedlings than did ultrapure water. Lower selenate concentrations additionally inflated the SOD (SOD), oxidase (POX), enzyme (CAT), and peroxidase (GPx) contents in seedlings and considerably slashed the stress-related malondialdehyde (MDA) content compared to ultrapure water. finally, rice seed plant germination and growth were promoted by priming with low selenate concentrations (15–75 mg kg−1) however smothered by priming with high selenate concentrations (90–105 mg kg−1). [4]
Influence of Different Water Frequency on the Growth and Yield of Cymbopogon schoenanthus (Camel Grass)
Cymbopogon schoenanthus could be a biennial or perennial grass that grows in a very dried stony setting, capable of withstanding harsh condition. during this analysis, the influence of various water frequency on the yield of Cymbopogon schoenanthus was assessed. Plant sample was moire once 3 days, 2 days Associate in Nursingd one-day continued for an interval of twelve months, however the controlled sample was moire daily. the expansion of the grass was evaluated every week, up to the amount once the plants were expected to succeed in vegetative and procreative part. the expansion parameters calculable ar plant height (cm), variety of leaves per plant, variety of seeds, flowers and stem or shoots bearing flowers. The result shows that samples were irrigated daily and yielded additional followed by samples irrigated once someday or 2 days intervals. The yield and productivity of the grass samples examined was higher underneath contributing condition. The seeds and inflorescent were obtained once four ways of cultivation within the samples that were moire daily. The seeds and flowers were spread by wind because the plant created new seeds. This resulted in decrease within the variety of seeds in a number of the treatment, resulting in less variety of seeds in a number of the treatments. From the analysis it shows that the water frequency has the result on the expansion of plant species. [5]
Reference
[1] Kent, L.M. and Läuchli, A., 1985. Germination and seedling growth of cotton: salinity‐calcium interactions. Plant, Cell & Environment, 8(2), pp.155-159. (Web Link)
[2] KATEMBE, W.J., UNGAR, I.A. and MITCHELL, J.P., 1998. Effect of salinity on germination and seedling growth of twoAtriplexspecies (Chenopodiaceae). Annals of Botany, 82(2), pp.167-175. (Web Link)
[3] Grotkopp, E., Rejmánek, M. and Rost, T.L., 2002. Toward a causal explanation of plant invasiveness: seedling growth and life-history strategies of 29 pine (Pinus) species. The American Naturalist, 159(4), pp.396-419. (Web Link)
[4] Rice seed priming with sodium selenate: Effects on germination, seedling growth, and biochemical attributes
Bin Du, Haowen Luo, Longxin He, Lihe Zhang, Yangfang Liu, Zhaowen Mo, Shenggang Pan, Hua Tian, Meiyang Duan & Xiangru Tang
Scientific Reportsvolume 9, Article number: 4311 (2019) (Web Link)
[5] M. Rabe, A., L. Aliero, B., M. Maishanu, H. and M. Maikudi, H. (2018) “Influence of Different Water Frequency on the Growth and Yield of Cymbopogon schoenanthus (Camel Grass)”, Asian Journal of Research in Agriculture and Forestry, 1(1), pp. 1-9. doi: 10.9734/AJRAF/2018/38731. (Web Link)