Leaf thickness to predict plant water status

Beta gauging leaf water status: influence of changing leaf characteristics.

Since the intvroduction (3) o,f the technique of beta gauging as a method for continuous and nondestructive mon!itoriing the water status of leaves, severcal reipo,rts (1-4) have appeared verifying the technique and its appl,ication in physio;logical research. Impliciit in this applicatiioni o?f beta gauging is the assutmption that, except for diurinal variations in water content, the physical ...

Water stress of sugarbeet as related to leaf and canopy temperatures and to leaf Water content

Stem diameter in relation to plant water status.

An instrument containing a linear variable differential transformer was constructed to obtain continuous, nondestructive measurements of both short term changes in stem diameter and long term growth. In cotton plants, stem diameter, leaf water potential, and leaf relative water content are all closely related to net radiation at the top of the canopy. Leaves from the east and west sides of a pl...

Correlations among Predawn Leaf, Midday Leaf, and Midday Stem Water Potential and their Correlations with other Measures of Soil and Plant Water Status in Vitis vinifera

A study was conducted to compare three measurements of determining water status of grapevines (Vitis vinifera L.) in the field. Predawn leaf water potential (ΨPD), midday leaf water potential (Ψl), and midday stem water potential (Ψstem) were measured on ‘Chardonnay’ and ‘Cabernet Sauvignon’ grapevines grown in Napa Valley, California late in the 1999 growing season. Both cultivars had been irr...

Plant Leaf Water Detection Instrument Based on Near Infrared Spectroscopy

In the near infrared spectral region, a reflection plant water detection instrument was designed by using microcontroller STC12C5A60S2. The instrument consisted of signal acquisition system, microcontroller system, software system and calibration model. The signal acquisition system was composed of three LED of different wavelength and a light-to-frequency converter. Three LED of different wave...