Associations between heat tolerance, water consumption, and morphological characters in Chinese cabbage

Abstract

Variations with regard to heat tolerance, in terms of heading ability, and water consumption under high temperatures were studied in various Chinese cabbage (Brassica campestris spp . pekinensis Rupr .) varieties .Total water consumption did not differ among entries ; however, heat tolerant varieties had greater water uptake than heat sensitive ones at the onset of head formation . Heat tolerant varieties also possessed thicker leaves, higher leaf sap electrical conductivity and chlorophyll content, and lower stomatal number . These characteristics appeared to facilitate water transport to the leaves and reduce transpiration, thus enabling the heat tolerant plants to maintain leaf turgidity during the heading stage at high temperature . Vigorous root growth also seems essential to supply adequate water to the leaves so that they can maintain good turgor at high temperature . Breeding for heat tolerance in Chinese cabbage may be accomplished indirectly by selecting for plants which possess relative thick leaves, high levels of electrolytes, high chlorophyll content, few stomata, and vigorous root growth .

Mining anatomical traits: a novel modelling approach for increased water use efficiency under drought conditions in plants

“…Similar results were observed in wild tomato lycopersicon pennellii (Kebede et al 1995), Chinese cabbage (Kuo et al 1988), wheat (Limin & Fowler 1994) and Quercus velutina (Ashton & Berlyn 1994).…”

Transgenic creeping bentgrass overexpressing Osa‐miR393a exhibits altered plant development and improved multiple stress tolerance

“…Presumably, the densely grown plants might be more advantageous than individually grown plants in buffering heat‐elicited damage. In Chinese cabbages, the high content of cuticular wax in heat‐tolerant cultivar plays an important role in affecting water balance in plants under heat stress, suggesting that the effects of heat stress are likely involved in drought stress under high‐temperature conditions (Kuo et al ., ). Our research shows that Osa‐miR393a transgenic plants exhibit denser cuticle than WT controls under normal conditions (Figure d), which also implies higher wax content in Osa‐miR393a transgenic plants.…”

Assessing Drought Tolerance of Snap Bean (Phaseolus Vulgaris) From Genotypic Differences In Leaf Water Relations,Shoot Growth and Photosynthetic Parameters

“…Under water stress conditions, snap bean continues vegetative growth, but only reduced at photosynthetic rates (Suzuki et al, 1987). In many crop species, including snap bean, even small diurnal fluctuations in leaf water status at anthesis can adversely affect the activity of reproduction structures (Saini and Aspinall, 1982;Kuo et al, 1988;Weaver and Timm, 1988;Tsukaguchi et al, 2003). Therefore, lack of photosynthate supply to reproductive organ may not be the only cause of premature abortion and abscission.…”