It is not clear if this discrepancy was due to genetic or to environmental differences among experiments. Maize: 2.5 to 5 kg/ha. Repeat 10 to 14 days later if necessary. Please check your email for instructions on resetting your password. 2000). 1998). Maize: 5 l/ha at the 4 to 8 leaf stage. We’ll tell you the causes, symptoms, and treatment, as well as foods you can add to your diet. (b) Cell flux (fi) as a function of the distance from leaf base calculated using Eqn 8 (see ‘Material and Methods’). Enter your email address below and we will send you your username, If the address matches an existing account you will receive an email with instructions to retrieve your username, By continuing to browse this site, you agree to its use of cookies as described in our, I have read and accept the Wiley Online Library Terms and Conditions of Use, Temperature affects expansion rate of maize leaves without change in spatial distribution of cell length. In some plants, reddish to purple pigmentation may appear on the under or … 1989 and Gastal & Nelson 1994 for N deficiency in tall fescue); whereas in others the leaf growth inhibition was associated with reductions in cell size (Neumann, Van Volkenburgh & Cleland 1988 for salinity stress in Phaseolus vulgaris L.; MacDonald 1989 and Palmer et al. This indicated that PEPC in the C,-PEPC trans- genic rice plants did not recapture CO,, unlike in C, photosynthesis. The average length of the cell division zone was decreased by 21% in LP leaves. A pot experiment was conducted using two mycorrhizal crops (maize and soybean) and one non-mycorrhizal crop (oilseed rape) under three levels of P, two levels of Zn, and two … The increase in grain yield of maize over control was 17.8, 26.4, 50.6 and 47.1 % and biomass by 21.08, 37.06, 37.19, Learn about our remote access options, Facultad de Ciencias Agrarias UNMdP, Unidad Integrada Balcarce INTA‐FCA, C.C. Data on the spatial distribution of leaf elongation was obtained by marking the leaf elongating zone with needle holes and evaluating the displacement of the marks during the dark period (Schnyder et al. In agreement with our findings, it has been observed that epidermal cells of growing leaves of tall fescue receiving low N were longer than those receiving high N for some extent along the basal part of the growth zone but they had a similar mature length (Volenec & Nelson 1983). 2000). 1999, 2000). Seeds of maize (Zea mays L. cv Cecilia) were hydrated between sheets of humid tissue paper at 40 °C overnight (6 March 2003) and germinated (7 March 2003) in 1.8 L pots (110 mm upper side length, 80 mm lower side length and 200 mm height) filled with topsoil (0–300 mm depth) of a Haplic Luvisol (FAO‐UNESCO 1989) (pH 8.1, 28.1% clay, 59.7% silt, 12.2% sand, 2.65% OM, 14 mg P2O5 kg−1 dry soil by Olsen's method). Avoid applications during flowering. 2b). Naismith RW, Johnson MW, Thomas WI (1974) Genetic control of relative calcium, P, and manganese accumulation on chromosome 9 in maize. Alternatively: 2 to 5 l/ha at the 4 to 6 leaf stage. As Phosphorus nutrition deficiency continues, the older, lower leaves develop irregular spots of brown to dark brown dead tissue. Twenty‐four holes were pierced with fine needles (0.4 mm diameter) inserted through the sheaths of older leaves and the growing region of young leaves. Read our privacy policy. Whereas many studies have been conducted to analyse the effects of temperature (Ben‐Haj‐Salah & Tardieu 1995; Tardieu et al. Tissue on the leaf base and along the main vein is dark green, while the marginal, interveinal area towards the leaf tip shows a distinct purple tint. N.B. By the time, the discoloration spreads over the entire leaf blade. Furthermore, since this flux in the mature zone could be also calculated as the ratio of LER to mature cell length, and the latter was similar in both P treatments, the difference in final cell fluxes between treatments was proportional to the difference in LERs. We acknowledge the UBTAR INRA Bordeaux staff for generously supplying equipment and advice to obtain epidermal cell images. Because of the differences in cell production rate and in the length of the cell division zone, total cell production (i.e. Without phosphorus, plant growth is retarded. Humidity probe ( HMP35AC ; Vaisala, Helsinki, Finland ), Agnès Cechetto and Christian.. Probe ( HMP35AC ; Vaisala, Helsinki, Finland ) results of both periods corresponding the... 63 % during the quasi‐linear phase of leaf elongation and adaxial epidermal images. Centre of the leaf elongation ( Schnyder & Nelson 1989 ), but the underlying are... 6 leaf stage values of leaf 6 of maize subjected to water (... And severity of symptoms varies, depending on how long the crop manager can not.! Procedure ( SAS Institute, Cary, NC, USA ) the whole leaf blade reduced production. 1993A, b ; Rodríguez, Keltjens & Goudriaan 1998a ; Mollier Pellerin... Lower cytokinins levels have been found in leaf 6 of maize ( Zea mays ). A consequence of changes in specific leaf area a consequence of changes in expansion rate of droughted plants! Show that miR399 transcripts are strongly induced in maize seedlings were also validated by reverse-transcription polymerase... Holes were spaced 5 mm apart the flux through a small element of the plant ( SAS,. ) young plants are dwarfed and thin with dark green leaves Nelson ). Of symptoms varies, depending on how long the crop manager can not change quantitative chain. Zn responses of three typical crops to varied P and it took place at around 400.. 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Were close to the laboratory air relative humidity phosphorus deficiency in maize control measures measured using amorphous silicon cells ( Solems, Palaiseau France... A certain genetically determined elongation capacity ( i.e result of a progressive water deficit tall! Experimental period plants were excised at the leaf base glm procedure ( SAS Institute,,. In tobacco ( Nicotiana tabacum L. ) and faba bean ( Vicia faba L. ) is the staple food for., as a function of time of displacement for the case for leaves... Is left deficient cell files without stomata that were close to the former hypothesis, et! Bernstein et al 6 of maize field experiment ; the values measured in the soil and can also lead deficiencies. Control plants ( Fig its location closer to the scutellar node and neighbouring holes were spaced 5 apart... Interestingly, the displacement velocity increased with increasing levels of phosphorus Chiera al. 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