DD277832A1 - MEANS FOR INCREASING THE STRESSTOLERANCE OF CULTURAL PLANTS - Google Patents

Abstract

The invention relates to means for increasing the stress tolerance of crop plants, in particular for increasing the drought tolerance and heat tolerance of cereal crops. As active ingredient, these agents contain 1-isopropylamino-3-naphthyloxypropan-2-ol, in particular as the salt of formula I. An effect of 1-isopropylamino-3-naphthyloxypropan-2-ol of the formula I by combining with 1-phenyl-1 hydroxy-N-methyl-2- (2-hydroxyethylamino) -propane of the formula II. Formulas I, II

Description

2. Composition according to item 1, characterized in that by combining with 1-phenyl-1-hydroxy-N-methyl-2- (2-hydroxyethylamino) -propane of the formula II an effect enhancement is achieved.

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Field of application of the invention

The invention relates to a means for increasing the stroke tolerance of crop plants. It can be used in particular for improving the tolerance of crops to abiotic stressors in agricultural crop production.

Characteristic of the known state of the art

It is known that yield depressions are primarily caused by physiological obtuseness. In addition, about 1 billion ha of agricultural land in the earth has yield-reducing salinity in the soil substrate. Even in humid climates, the salt concentration in the soil water during temporary dryness, especially at high mineral fertilization, increases to plant physiologically unfavorable levels. Particularly sensitive to salt are known to be germinating plants and young plants. To mitigate these ertragssonkendon salt effects, for example, ground treatments are made with gypsum, but which are associated with an enormous transport and energy costs. It is also known to solve by salting sblztoleranten Pf'anzen the salt problem. However, significant successes have not yet been achieved in this way. By the use of phytohormone and synthetic Wirkungsanaloga the phytohormones improvements are known known (DD-PS 218260, DDPS 217408, DDPS 217409 and DDPS 217410). It is known that an increase in the plant salt tolerance is also achievable with the use of quaternary ammonium bases which have a growth-regulating effect (DDPS 215686, DDPS 215688). However, the effect of the phytohormones and synthetic growth regulators is insufficient under certain conditions. Dio uncertainty of Gibberelüne and cytokinins with phytohormone character u. a. that dinse substances increase transpiration at the same time and thereby lower the water status stability of the plants. When using the growth inhibitor chlorocholine chloride, the threshold of growth-inhibiting influences has been exceeded under salt conditions, so that then no yield advantages result from using funds. Furthermore, the production of phytohormones is very expensive and the use of chlorocholine chloride with toxicological Problemon kept. Toxicologically unfavorable also salzstroßabschwächende hydroxylamine derivatives (DD-PS 216159) are to be evaluated. By using brassinolides, the salt tolerance, cold resistance and resistance to Horbiziden »oi crops, bypassing toxicological disadvantages can be increased (JP-PS 60113567, DE-OS 3533633). At the same time in individual plant experiments under certain conditions, the biological material production of Gotreido and potatoes with higher significance than in phytohormones increased (DE-OS 3533633. JP-PS 57-118503). However, this increase in revenue is not clearly effective due to the high cost of drugs. A Salztoloranzverbesserung, which is also coupled nM a yield-enhancing water balance optimization is achieved by biogone and symbolic ethanolamines on individual plants and field crops (DD-PS 255871, DD-PS 151104), the dio application rates conventional standards for growth regulators correspond and the Molaro biological activity standard words does not exceed. From umwolthygicnischcr point of view, however, high biological effects are desirable with low funds. The fatty acid mixtures of microbial origin used in accordance with DD-PS 226471 had a very different spectrum of phthalic acid, depending on the batch, so that different biological effects were determined.

Aim of the invention

The aim der.Erfindung is to provide means for increasing the stress tolerance of crops, in particular to increase the salt and drought tolerance, which are inexpensive to produce and have toxicologically favorable properties and are safe in terms of environmental protection.

Explanation of the essence of the invention

The invention has the object. to develop compositions for increasing the stress tolerance of crop plants, in particular for increasing the drought tolerance and heat tolerance of cereal plants, the use of which results in the stabilization of yield formation.

The object is achieved in that means for increasing the stress tolerance of crops in addition to conventional Hills and carriers as active ingredient i-isopropylamino-S-naphthyloxypropan ^ -ol, in particular as the salt of formula I,

ICi ₁ Formula I)

s? V. _/ / ^X ** ^{! S;} ^ HC ^- -C ^ 3 (χ: acid residue, preferably Cl)

An effect enhancement of i-isopropylamino-Gnaphthyloxypropan ^ -older the formal is achieved by combination with 1-phenyl-1 hydroxy-N-methyl-2 (2-hydroxy (ithylamino-propane of the formula II.

( \ -C ^ - CU-N-CH ₁ -CH ₁ -OH ^lFmmem

OH CH ₁ CW ₃

Ausführungsboisp.Ha example 1 Influence of the agents according to the invention on the use of wheat in the seed stage

The inclusion of the compositions according to the invention in the utilization of water and the production of biological substances by Sommorwoizen (cv Hatri) was determined in Kloinstgofäßvorsuchon. The plants were grown on quartz sand (- 700 g / vessel, in each vessel there were 1Γ plants in the following fertilization / vessel: 60 mg N, 44 mg P, 77 mg K, 31 mg Ca, 12 mg Mg, 115 μΙ FeCl ₅ as 10 ° solution; 11ίϊμΙ A'Z (a) solution to HOAGLAND). The water consumed in the vascular experiment (current evapotranspiration) is determined by daily repeated weighing of the vessels and, following each weighing, is replaced by word '

 The Wasscrausnutzung (WUE) resulted from:

Biomasso produced (total biosynthesis) .

Wacsorverbrauch

The WUE is an essential criterion for the evaluation of the dry pulp tolerance.

According to the results of Table 1, the compositions according to the invention increase the water utilization (WUE) by -20 ° C. The biological effectiveness on this dry stress criterion WUE is much higher than the activity of the known bioregulator CCC. It is also essential that the biohazability of 5 10 ⁴ mol / l i-isopropylamino-3-naphthyloxypropan-2-ol with dose reduction au '1 x 10 ⁴ mol / l is maintained or is slightly improved if 1 10 Snol / I have been added to the 2-Hydro.xyothyianinopropan derivative indicated in Formula 2.

Table 1: Influence of the agents according to the invention on the water utilization of wheat plants

medium dose • MO ⁴ Sproßbio WUE root dry weight lengths minor)" - (Rel.) (Rel.) (Rel.) a) according to the invention - 1 isopropylamino-3 MO ' 80 105 74 naphthyloxypropon-2-ol 5-10 " 109 121 * 106 (Formally) 1-10 ⁴ 103 111 106 i-isopropylamipo-3 naaphthyloxypropan-2-ol MO " ⁴ plus 110 122 · 107 2-hydroxyethyl-aminopropyltriethoxysilane MO ⁴ pan-derivative (Formelll) 2-hydroxyethylamino 1 -10 ⁴ 104 109 105 pan-derivative (Formelll) b) comparison test elements chlorcholin chloride 99 104 102 c) without funds Control with stress 100 100 100 (110mg / (4.5g / kg (24,8cm) Plant) H ₂ O)

11 2 ml solution / vessel • α - 0.05

Example 2 Influence of the agents according to the invention on the yield, the water utilization and the N-household of Sommergorste

The influence of the compositions according to the invention on yield and physiological stress colorant parameters was determined in Example 2 in the Gofäß test using spring barley (cv Trumpf). The plant cultivation was carried out in a sand / Bodon-Gomisch (2: 1, m / m 6.9 kg Substrattrcckenmasse per Mitscherlichgefäß). According to culture, 15 plants were cultured with the following nutrient supply: 0.7 g N; 0.5g P; 1.5g K; 0.3g Mg; 0.6g Ca; 30mg of Fe and Micronutriento. The water consumption has been determined by daily weighing of the culture vessel and following each weighing, the loss of water (evapotranspiration) has been replaced. From DC stage 45 (ear shedding), the plants were exposed to stress conditions (periodic lack of water) and temperatures of 32 ... 38X. The compositions of this invention became aqueous DC27

Solution sprayed on the leaves (per vessel 6mol / l preparation solution).

The determination of the WUE was carried out according to the information given in Example 1. N contents are determined by the Kjeldahl method (semimetrical

Exports).

According to the results of Table 2, the compositions of the invention increase bicompound formation and protein yield under heavy environmental load. In addition, the N content is increased under the condition of impact. Increased N contents with simultaneously yielding yield are a further indicator of the attenuation-reducing effects of the agent according to the invention.

Table 2: Influence of the funds according to the invention on yield, water utilization and N-balance of spring barley under extreme stress conditions

Medium (Concentration) "

grain yield

(Rel.)

Yield oborird. Biomass (TM) (rel.)

WUE

(Rel.)

N-content

(% in grains)

Crude protein yield (rel.)

a) according to the invention i-isopropylamino-3-naphthyloxypropan-2-ol (Formal)

(1 -10 ² mol / l)

b) Comparative test element chlorocholine chloride (2-10 'mol / l)

c) without funds Kontrollo

108

105

100

112 '

104

100

2.37

2.10

2.07

(16.6g / Gofäß) (33,0g / jar)

(3.4 g / kg H ₂ O) -

127 *

108

100 (2,12g / Gofäß)

1) Application of C ml of a watery solution per vessel ': u 0.05 C): protection over confiicting interval

3eicp! El 3

Ein Ιιιϋ of the inventive means for substance uptake and root growth of spring barley

The experimental procedure for Example 3 corresponded to the information in Example 2. However, the harvesting of the plant material already took place at DC stage 70.

Table 3: Influence of the means according to the invention on root growth and uptake of summer barley plants under stress conditions

medium admission root mass water quote for N appropriation (Rel.) (Rel.) (Rel.) a) according to the invention " 1-isopropylamino-3- 113 121 105 naphthyloxypropan- 2-ol (formula I) b) comparison variant chlorcholin chloride 105 112 102 c) without funds control 100 100 100 (12:47) " (3.9 g / vessel) (10.1 g / vessel)

1) Dosage as in Tab. 2

2) proportional choice of fertilized / u absorbed NMenge

The agents of the invention increase root growth and uptake as another physiological feature for potential stress mitigation.

Claims (1)

1. A means for increasing the stress tolerance of crops, in particular for increasing the drought tolerance and heat tolerance of cereal plants, characterized in that they in addition to conventional excipients and carriers as the active ingredient 1-isopropylamino-3-naphthyloxypropan-2 el, especially as the salt of HCl Formula I included '_ ^ _ £ // (Formally) "^" ^ r Lj ( ^χ: acid radical, preferably Cl ")